Reversing its stance from a year ago, the Maine Principals’ Association approved a waiver Tuesday morning to allow Portland High and Deering High to form a co-op boys’ ice hockey team for the next two years.

Deering did not have a boys’ ice hockey team last year after the MPA denied its request for a co-op waiver with Portland.

“I think the circumstances are different,’’ said Dick Durost, executive director of the MPA. “The major change from a year ago is that one of the teams (Deering) did not have a program.’”

Officials from both Portland public high schools spoke to the MPA’s Interscholastic Management Committee, hoping to persuade it to allow the waiver.

“We were able to make some persuasive arguments,’’ said Mel Craig, the athletic director at Deering. “And when they took all the factors into consideration, they voted in our favor.’’

This story will be updated.