ESSENDON and the AFL Players' Association convened another parents' briefing on Thursday night, with anxiety levels increasing as the club's D-Day fast approaches. 

Parents joined Essendon officials, AFLPA CEO Paul Marsh and legal representatives Brett Murphy and Bernie Shinners at the club's Tullamarine headquarters. 

As well, a large number of parents were involved in a telephone hook-up at a session arranged earlier this week. 

The AFL Anti-Doping Tribunal will rule on March 31 over the legality of Essendon's 2012 supplements program, with 34 past and present Bombers under provisional suspension.

Marsh said tension was growing among all involved. 

"Of course, we heard (Essendon captain) Jobe (Watson) talk about it yesterday, and there's no doubt the players are anxious. As anyone would be in this situation," Marsh told The Footy Show. 

"Tuesday can't come quick enough.

"They (the parents) want to understand the process, which is understandable, and what may happen under the different options and scenarios, and a few other questions on how we're supporting the players, how the club's supporting the players. 

"I wouldn't say there are any questions you wouldn't expect. We've been planning for all scenarios for a while - you have to." 

ASADA is open to appealing the tribunal's decision should it not be content with the outcome on Tuesday.