Yes. You can convert between any one of the three storage methods at any time. If taking delivery of unallocated metal or pool allocated metal it must be converted to allocated. Fabrication costs will be payable at the time of conversion and based on precious metal market prices at the time of the conversion.
Converting from allocated or pool allocated metal will be processed as a sell of the physical metal and a buy of the unallocated metal using the applicable spot prices and fees. Some products may be temporarily unavailable due to production lead time constraints. Find out more about storage options here and storage fees here.