For some reason it's not on the IRB site -
http://hertsrefs.co.uk/docs/2013_14/IRB_Clarification_-_Lineout.pdf . (it's also a tad old at 2014)
IRB clarification for teams choosing not to engage at the lineout
if the defenders in the line out choose to not engage the line out drive by "leaving theline out as a group", PK to attacking team;
if the defenders in the line out choose to not engage the line out drive by simplyopening up a gap & "creating space" & not leaving the line out, the following processwould be followed:
- attackers would need to keep the ball with the front player, if they were to drivedown-field (therefore play on, general play
- defenders could either engage toform a maul, or tackle the ball carrier only);- if they had immediately passed it back to the player at the rear of the "group",the referee would tell them to "use it" which they must do immediately...
- if they drove forward with the ball at the back (did not release the ball), thereferee would award a scrum for "accidental offside" rather than PK forobstruction.