It’s in the certificates not combinable section. Same one that says can’t combine a free night certificate with a suite upgrade award or club lounge certificate.


“7. Awards Not Combinable. Unless expressly set forth in the terms for the applicable award type or elsewhere in these Program Terms, awards are not combinable on the same dates with other awards, upgrade certificates, partner awards, certificate discounts or benefits, incentive travel awards, vouchers, checks or any other special offers. However, a Member may choose to use multiple awards for back-to-back stays. Without limiting the generality of the foregoing, (i) awards from more than one Member's Program account may not be applied as part of a single stay and (ii) awards that provide for Club lounge access may not be combined with any Complimentary Suite Upgrade Award (as defined below).”