GLD has some amendments to its terms up for vote, one of which is "that creations may only be made after the required gold deposit has been allocated to the Trust Allocated Account from the Trust Unallocated Account" (hat tip I Shrugged; see here for an explanation of the existing creation process). What is interesting is the explanation of why they are making this amendment:

"This amendment provides additional security for Shareholders by eliminating potential risks related to issuing baskets of Shares against unallocated gold if the Custodian was to become insolvent or if the unallocated gold was otherwise not allocated for some other unforeseen reason."