OSHPD SCBF's using HSS Braces

Section 2205A.4.1.5.1 of the CBC modifies AISC 341 for SCBF's using RECTANGULAR HSS sections. The section requires them to be filled solid with cement grout. This is for OSHPD only projects.

Question: Do the really mean Rectangular and Square HSS sections or only Rectangular as stated?

thanks,
-gm