P.R. Laws Ap. tit. 34A, § II, Rule 158
Upon a trial for the violation of any of the provisions of §§ 291-298, both inclusive, of the Penal Code of Puerto Rico, §§ 1211-1218 of Title 33, it shall not be necessary to prove the existence of any lottery in which a lottery ticket purports to have been issued, nor to prove the actual signing of any such ticket or share, purported ticket or share, of any purported lottery, or that any lottery ticket, share or interest was signed or issued by the authority of any manager, or of any person assuming to have authority as manager. But in all cases proof of the sale, bartering, or proceeding of any ticket, share, or part or share or of any document purporting to be such ticket, share or interest thereof, is evidence that such share was signed and issued according to the purport thereof.