P.R. Laws tit. 16, § 1333
The Presidential Primaries established in this chapter shall consist of one balloting in one single ballot where electors shall express their preference for the aspirant to the presidential candidacy of the National Party of which they are bona fide members and a ballot to elect delegates and alternate delegates to the National Nominating Convention. The result of the expression of preference for the presidential candidate shall not affect the election of delegates or alternate delegates.
The balloting in said primaries will be carried out through the open-poll system, and in separate places for each of the national parties participating therein. The primaries shall be held according to the applicable provisions of Act No. 4 of December 20, 1977, with due guarantees at all times, of the elector’s right to equal, direct, free and secret suffrage, using the identification card provided in Act No. 4 of December 20, 1977.
Only one electoral list shall be used to identify the electors in which the preference of the elector must be specified as to the national party for which he plans to vote.
No person shall participate and/or vote in the nomination process for presidential candidates of one national party who has also participated in the nomination process of any other national party for the corresponding election.
All electors shall certify under oath that he/she has not participated, nor shall participate in any electoral process regarding the selection of presidential candidates or delegates to national nominating conventions for the same presidential election of a national party other than the one he/she plans to vote [in]. This oath shall be taken by a polling-place official duly certified by an electoral representative and shall constitute a certification for the purposes of Section 225 of Act No. 115 of July 25, 1974, known as “Penal Code of Puerto Rico”.
History —Sept. 24, 1979, No. 6, p. 997, § 13; Oct. 3, 1983, No. 34, p. 448, § 7; renumbered as § 18 and amended on Mar. 15, 1984, No. 2, p. 5, § 11; renumbered as § 17 and amended on July 2, 1987, No. 89, p. 347, § 8; Feb. 28, 1992, No. 2, § 3.