Line up for new subs

[heyref32]

Situation, Team A subs in three or more subs. After Team A subs have legally entered game Team B coach requests a line up. Do you grant the request? Can either team's coach request a line up? Does it have to be on three or more subs or can request be made on any number of subs. I believe this was in the rulebook 98-99? and then taken out, no reason given. Can references in rulebook be given if any. Thanks.