Should be allowed but only once the season has been completed.
The current system favours associations at the expense of individual players.
Outside of the actual VJBL season, players should be treated as Free Agents. They should not be tied to a particular association once a season has been completed.
This would eliminate the need for all the red tape required for a player to tryout with and / or transfer to a new association. Would also eliminate the need for transfer exemptions and consign player transfer limits to the bin.
If a player is good enough to attract the attention of several teams, the player themselves should get to decide where they would like to play next season, not BV and not any association they played with previously.
We are talking about VJBL here, not some Professional League. In VJBL, the players and their families are the ones who pay truckloads of money to be involved in playing basketball. And often, many of those players and their families pay high fees that subsidise the associations semi-pro and professional teams.