SECTION 1. Section one of Commonwealth Act Numbered One hundred forty-two, is hereby amended to read as follows:
"SECTION 1. Except as a pseudonym solely for literary, cinema, television, radio or other entertainment purposes and in athletic events where the use of pseudonym is a normally accepted practice, no person shall use any name different from the one with which he was registered at birth in the office of the local civil registry, or with which he was baptized for the first time, or, in case of an alien, with which he was registered in the bureau of immigration upon entry; or such substitute name as may have been authorized by a competent court: Provided, That persons, whose births have not been registered in any local civil registry and who have not been baptized, have one year from the approval of this act within which to register their names in the civil registry of their residence. The name shall comprise the patronymic name and one or two surnames."