P.R. Laws tit. 10, § 223f
Any person that considers he/she is injured by the registration of a mark can oppose said registration by filing a notice of opposition before the Secretary stating the grounds therefor, within thirty (30) days following the date of publication of the public notice. Notwithstanding the foregoing, the opposing party may request, before the term has elapsed and by just cause, an extension of up to twenty (20) days. The opposing party shall issue to the applicant a copy of the notice of opposition through certified mail with acknowledgement of receipt or by any other means with proof of delivery. The Secretary shall establish by regulations the procedure to be followed for the adjudication of the opposition.
History —Dec. 16, 2009, No. 169, § 8.