P.R. Laws tit. 31, § 2204
The deaf and dumb and those who cannot speak, but who are able to write, may execute a closed will, the following being observed:
(1) The will must be written entirely and signed by the testator, stating the place, day, month, and year.
(2) On presenting it, the testator shall write on the outside of the envelope, in the presence of the notary and of five witnesses, that said envelope contains his will and that it is written and signed by him.
(3) Immediately after what is written by the testator, the memorandum of execution shall be drafted, the notary certifying that the provisions of the foregoing number have been observed, as well as the provisions of § 2202 of this title, insofar as may be applicable to the case.
History —Civil Code, 1930, § 659.