"The Rules of the Republican Party" adopted by the RNC:
https://www.gop.com/rules-and-resolutions/ as of 8 January 2017.
The interpretations on this page were last updated on 16 January 2017.
Iowa, New Hampshire, South Carolina, and Nevada may hold their delegate selection primaries, caucuses, and conventions no earlier than one month before the next earliest state. The remaining jurisdictions may begin their processes on 1 March 2020 [Sunday] and must finish by the 2nd Saturday in June [13 June 2020] [Rule 16(c)(1)]. Note that Rule 20(a) says "All delegates shall be elected or selected not later than 45 days [TBD] before the ... national convention.".
- The computations used to create this document are described in the "The Rules of the Republican Party" adopted during the 2016 Republican National Convention.
- Republicans base delegates are determined by the number of U.S. Senators and U.S. House Members elected by each state.
- Bonus delegates are awarded based on the number of party members elected as Presidential Electors (2016), Governors (2016-2019), House members (2016-2019), Senators (2014-2019), and state legislatures (2016-2019).
- For jurisdictions with Constitutionally Elected Members of Congress:
- 10 At-Large delegates from each state (effectively, 5 at-large delegates for each U.S. Senator) [Rule 14(a)(1)].
- 3 District delegates for each U.S. Representative as established by the 2010 census [Rule 14(a)(3)].
- For jurisdictions without Constitutionally Elected Members of Congress [Rule 14(a)(4)]:
- 6 at-large delegates from American Samoa.
- 16 at-large delegates from the District of Columbia.
- 6 at-large delegates from Guam.
- 6 at-large delegates from the Northern Mariana Islands.
- 20 at-large delegates from Puerto Rico.
- 6 at-large delegates from Virgin Islands.
- For all jurisdictions (the 50 states plus American Samoa, District of Columbia, Guam, Northern Mariana Islands, Puerto Rico, Virgin Islands) - 3 party leaders: the national committeeman, the national committee woman, and the chairman of the jurisdiction's Republican Party. [Rule 14(a)(2)]
- Bonus Delegates
- President: States casting a majority of their 2016 Electoral Votes for the Republican Candidate receive 4.5 + 0.60 × the jurisdiction's total 2016 Electoral Vote in bonus delegates. Should the District of Columbia cast the majority of their electoral votes for the Republican Candidate, the District will receive 4.5 + (0.30 × 16) in bonus delegates. Round any fractional remainder UP to the next whole number. [Rules 14(a)(5) and 14(a)(8)]
- U.S. Senate: Award 1 bonus delegate for each Republican Senator elected in the 6 year period between January 1, 2014 and December 31, 2019. Limit 2. [Rule 14(a)(7)]
- Governor: States electing a Republican Governor between January 1, 2016 and December 31, 2019 receive 1 bonus delegate. Limit: 1. [Rule 14(a)(6)(i)]
- U.S. House: States electing Republicans to 50% or more of their U.S. House delegation between January 1, 2016 and December 31, 2019 receive 1 bonus delegate. Limit 1. [Rule 14(a)(6)(ii)]
- One Chamber: States electing a Republican majority to one chamber of the state legislature (and the chamber is presided over by a Republican) between January 1, 2016 and December 31, 2019 receive 1 bonus delegate. Limit 1. [Rule 14(a)(6)(iii)]
- All Chambers: States electing a Republican majority to all chambers of the state legislature (and all chambers are presided over by a Republican) between January 1, 2016 and December 31, 2019 receive 1 bonus delegate. Limit 1. [Rule 14(a)(6)(iv)]
The Nebraska state Legislature is unicameral and elected nonpartisan. In January 2017, unofficially 35 of 49 are Republicans. Senators were Republicans and Speaker Jim Scheer is a registered Republican. We assume the state will receive 2 bonus delegates: 1 for One Chamber and 1 for All Chambers.
Delegate Allocation to Presidential Contenders
States taking a Presidential Preference vote in a primary, caucus or convention, bind their delegates according to that vote. Alternately, delegates may be elected directly (by name) from a primary ballot. A jurisdiction doing neither of the above elects delegates directly in a caucus or convention without regard to Presidential Preference.
In addition, the delegates are bound to their pledge all they way through to the convention. The rules indicate that a delegate can be removed for merely demonstrating support for a candidate other than one to which he or she is bound. [Rule 16(a)(2)]
- "Any ... process to elect ... delegates to the national convention that occurs prior to [Sunday] March 15 [, 2020] ... shall provide for the allocation of delegates on a proportional basis." [Rule 16(c)(2)]
- A state may establish ... [a] minimum threshold of the percentage of votes received by a candidate ... below which a candidate may receive no delegates, provided such threshold is no higher than 20%. [Rule 16(c)(3)(i)]
- A state may establish ... [a] threshold of the percentage of votes received by a candidate that must be reached, above which the candidate may receive all the delegates, provided such threshold is no lower than 50%. [Rule 16(c)(3)(ii)]
- "Any statewide presidential preference vote that permits a choice among candidates ... must be used to allocate and bind the state’s delegation to the national convention ... except for delegates ... who appear on a ballot in a statewide election and are elected directly by primary voters." [Rule 16(a)(1)]
- "... If any delegate bound ... to vote for a presidential candidate at the national convention demonstrates support ... for any person other than the candidate to whom he or she is bound, such support shall not be recognized. ... no presidential candidate shall have the power to remove a delegate." [Rule 16(a)(2)]
There are 2 start dates: 1 for the carve-out states and another the remaining jurisdictions. If a state bound delegates earlier, there is a 50% sanction.
The carve-out states have a floating date: "1 month before the next earliest state". The timing penalty for the non-pre-window states is no longer 50% of their delegation but a reduction to 12 delegates if they begin before the last Tuesday in February-- 25 February 2020.
- No primary, caucus, or convention to elect, select, allocate, or bind delegates to the national convention shall occur prior to [Sunday] 1 March  .... Except Iowa, New Hampshire, South Carolina, and Nevada may begin their processes no earlier than 1 month before the next earliest state ... [Rule 16(c)(1)]
- No delegates ... shall be elected, selected, allocated, or bound ... to any Republican Party ... which materially changes the manner of electing, selecting, allocating, or binding delegates ... or the date ... [the] Party holds a presidential primary, caucus, [or] convention ... if such changes were ... made ... after October 1 of the year before ... the national convention .... [Rule 16(d)(12)]
- "If any state .. violates Rule No. 16(c)(2) [proportional allocation prior to Sunday 15 March 2020], the number of delegates ... shall each be reduced by 50%. Any sum presenting a fraction shall be decreased to the next whole number. No delegation shall be reduced to less than 2 delegates... . If any state or state Republican Party violates Rule No. 16(c)(1) of these rules, the number of delegates ... shall be reduced for those states with 30 or more ... delegates to 9 plus the members of the Republican National Committee ..., and for those states with 29 or fewer ... to six 6 plus the members of the Republican National Committee ... ." [Rule 17(a)]
- "If any state or state Republican Party violates Rule No. 16(c)(2) of these rules [proportional allocation prior to Sunday 15 March 2020], the Republican National Convention shall provide for the allocation of the selected at large delegates (excluding members of the Republican National Committee) among the candidates who received more than 10% of the votes ... in proportion to the votes cast for each ... candidate ... ." [Rule 17(a)]
There shall be a Standing Committee on Presidential Primary Debates .... The ... Committee ... shall have the authority to sanction debates ... based on ... considerations of timing, frequency, format, media outlet, and the best interests of the Republican Party ... Any presidential candidate who participates in any debate that is not a Sanctioned Debate shall not be eligible to participate in any further Sanctioned Debates... [Rule 10(a)(10)]
States should accommodate military voters.
Any process ... for selecting delegates ... for binding the presidential preference ... shall use every means practicable to guarantee the right of active duty military personnel and individuals unable to attend meetings due to injuries suffered in military service the opportunity to exercise their right to vote in that process.... [Rule 16(d)(7)]
As in previous cycles, a state cannot appeal their sanctions.
- A state ... Republican Party shall have no appeal from ... a penalty imposed upon it ... [Rule 17(g)].
The party has clarified the nomination requirements for candidates at the convention.
Each candidate for nomination for President ... and Vice President ... shall demonstrate the support of a majority of ... delegates from ... 5 or more states ... [T]he affirmative written support ... shall have been submitted to the secretary of the convention ... prior to the placing of the names of candidates for nomination .... [Rule 40(c)]