This? That's the same rules to be followed by the DVHL. It doesn't say anything about time in-between the end and beginning of the regular season.
Rules and Regulations(a) Girls Rostering – Female players may only be rostered on one club
of the following: USAH Tier I (either National Bound or Non-National
bound) or USAH Tier II National Bound club roster from August 1
through the end of USA Hockey Nationals each season. Exceptions
are that the player may also be rostered on an AAHA recognized
scholastic team, a team in an AAHA recognized house league, a
youth Tier I or Tier II travel team or any AAHA affiliate sponsored
teams.
1 player one team pertains to all players so they don't double roster or play in both tier 1 and tier ll leagues.