From the MLS HQ press release:
Today marks a key date for all 13 MLS teams as they must be roster and budget compliant. In order to be compliant teams must be inline with the following by 5pm EST today:
* Toronto FC gets three (3) additional Senior International players as long as those three players qualify as domestic for US-based teams.
** Toronto FC may have five (5) Youth Internationals
More key roster dates for the season for those who care:
March 5, 2007: Waiver Draft
April 9, 2007: First date Senior Roster players may be waived without financial charge to team salary budget
April 13, 2007: Primary Transfer Window closes
June 1, 2007: College Protected list finalized (all college players from 2007 SuperDraft either on roster or waived)
June 15, 2007: Secondary Transfer Window opens
August 15, 2007: Secondary Transfer Window closes
September 14, 2007: Roster Freeze Date / Trade and Discovery Deadline