Jim,
The chips listed above as well as the following from 2003 opening and the 2005 10 years of gaming are the ONLY chips accepted at the Spa property (along with the current NCVs):
CG13980
CG13982
CG13974
CG15456
Any other chips are considered foreign. I haven't been at Agua Caliente in more than a year. I cannot honestly tell you which chips are in play there but I'm sure that with the exception of the NCVs all of our chips are considered foreign to them.