Sideline Warning/Sideline Interference

[Brandon Kincer]

when would you issue a sideline warning?

Could I throw a flag and issue a sideline warning/penalty for a player that steps over his line to get a better view and impedes my path?

Could I issue a sideline warning to a coach who is yelling at me from the sideline in lieu of a USC Penalty?

When issueing a sideline warning do you throw the flag?

Just to let you know I did reference the rulebook. The rulebook only references NF. 9-8-1k which states Being outside the team box, but not on the field. It also says (See NF. 9-8-3) Which states A nonplayer shall not be outside his team box unless to become a player or to return as a replaced player. A maximum of three coaches may be in the coaches' area