When was lifting allowed in Rugby lineouts?

Answer 1

Reference to Lifting as a technique in the line out was written to the laws in the 2009 edition of IRB Regulation 19.

Law 19 states

Lifting and supporting. Players may assist a team-mate in jumping for the ball by lifting and supporting that player providing that the lifting and/or supporting players do not support the jumping team-mate below the shorts from behind or below the thighs from the front.

In the 2008 edition of the same law stated that;

Support of a player. A player must not support a jumping team mate below the shorts from behind or below the thighs from the front.

Penalty: Penalty Kick on the 15 metre line.