--- You wrote:
How does that wording compare with the wording for offside?
To be offside, a player must have both skates across the blue line.
Does one skate in the crease constitute "standing in the crease"?
--- end of quote ---

6-33-a
Offsides
SECTION 33. a. The position of the playeris skates and not that of the stick
shall be the determining factor in all instances deciding an offside. A
player is offside when both skates are completely over the outer edge of
the blue line involved in the play at the instant the puck completely
crosses the outer edge of that line. While the position of the playeris
skates is what determines whether a player is offside, the question of
offside never arises until the puck completely has crossed the outer
edge of the line.

A player is onside when either of the skates is in contact with or on
the playeris own side of the line at the instant the puck completely
crosses the outer edge of that line.