"It shall be considered a dangerous play when a player deliberately heads or attempts to head the ball. Any violation of this rule shall result in an indirect free kick for the opponent. Simultaneous violations by both teams will result in a dropped ball."
Click here for additional information from Mass Youth Soccer Assoc.
Assignor's PPT 2017.pptx
Laws of the Game
IFAB 2017/2018 (PDF)
Referee Gear at Officialsports.com
A player is cautioned and shown the yellow card if he commits any of the following seven offences:
A substitute or substituted player is cautioned if he commits any of the following three offences:
A player, substitute or substituted player is sent off if he commits any of the following seven offences:
A player, substitute or substituted player who has been sent off must leave the vicinity of the field of play and the technical area.