NFL Commissioner Roger Goodell sent a memo to the league's 32 teams regarding where they stand on any relocation to the Los Angeles area, the Los Angeles Times reports.
Los Angeles has not had professional football since the Raiders and Rams left after the 1994 season.
Goodell wrote that issues such as approval to relocate, assessment and terms of a relocation fee, financial commitments from the league for stadium construction, and Super Bowls awarded must come from the full membership of teams. Any such approval would require a three-quarters vote of membership, or at least 24 teams.
Goodell said in the memo that the overall goal is to ensure that any league re-entry to the Los Angeles market is as successful as possible.
"Although substantial uncertainties remain," Goodell wrote in the two-page document, "stadium development in Los Angeles has advanced to the point where the prospects for a new facility are better than they have been in many years."