SG4 states:
Horizontal expansion is limited until the Endgame. Robots may not expand beyond a horizontal area of 18” x 18” at any point during the Match prior to the Endgame.
SG5 states:
Vertical expansion is limited. Robots may expand vertically within the following conditions:
a. The Robot must not be contacting the gray field tiles in either Low Goal.
b. No part of the Robot may exceed an overall height of 24”. This height limit is a “virtual ceiling,” meaning that no part of any Robot may ever exceed 24” above the foam tiles, regardless of Robot orientation.
c. Any extensions or combinations of extensions above 18” must fit within a vertical cylinder 2” in diameter.
VUR1c states:
One Robot must be smaller than 15” x 15” x 15” at the start of the Match.
Given these rules, is it legal for the 15" robot to expand horizontally to a maximum of an area of 18” x 18” according to SG4, as well as vertically according to the limitations in SG5?