No.
There's never been any rule or policy in college sports that prevented a player from transferring. Mandatory sit-out-a-year rules (whether within a league or interdivisional) did provide obstacles, but they couldn't prevent what has always been every student's right. College isn't the Army; you don't sign up for a binding four-year commitment from which there is no escape.
Transfers have been a part of college sports forever. The portal simply added convenience -- and, thus, acceleration to a trend towards increased transferring that was already growing -- to a truth of academic life that has always existed. And NIL added incentive.
There's never been any rule or policy in college sports that prevented a player from transferring. Mandatory sit-out-a-year rules (whether within a league or interdivisional) did provide obstacles, but they couldn't prevent what has always been every student's right. College isn't the Army; you don't sign up for a binding four-year commitment from which there is no escape.
Transfers have been a part of college sports forever. The portal simply added convenience -- and, thus, acceleration to a trend towards increased transferring that was already growing -- to a truth of academic life that has always existed. And NIL added incentive.