30-second time-out: Teams/Players standing

[tjones1]

I may be making MTD Sr. to go dig in the vault; however, I don't think it's too far back...maybe not.

Anyways, I was wondering when they changed (if they did) 5-12-5.

In an interp from 2001-2002 it states the following:
SITUATION 11: Each team and the official scorer have been notified that Team A has called a 30-second timeout. Team A decides to sit down on its bench. RULING: Incorrect procedure. The official should first inform the coach that his/her team is to remain standing during a 30-second timeout. If the coach refuses to adhere to the officials’ request, an unsporting technical shall be assessed. (5-12-5)

Currently, 5-12-5 reads:
Players shall remain standing within the confines of the bench area during a 30-second time-out.

Therefore, could someone please tell me when they changed it from the team having to remain standing to just the players?