In 1993, the federal Agrarian Law was amended allowing for more secure foreign tenure of former "ejido" land. Those controlling "ejido" land were allowed to petition for regularization, a process that converted their controlling interest into fee simple ownership. This meant that the property could be sold, and it led to a boom in the development of private residences, mostly condominiums, and a new phase of Puerto Vallarta's expansion began, centered more on accommodating retirees, snowbirds, and those who visited the city enough to make purchasing a condominium or a time-share a cost-effective option.