The SEC has a limit of 50 million dollars in securities per year, per entity for any issuer selling under Regulation A+ (which is the regulation under which the bonds were qualified in WPC, WPC II & WCB & WCB II etc). So, as limits within these issuing entities are reached no additional bonds can be sold until a 12 month period has passed when more bonds can then be qualified.
Please note since WPC, WPC II, WCB & WCB II were created, the limit sold in Regulation A+ has been raised to 75 million dollars in securities per year, per entity. We will be able to sell more bonds from these issuers once they re-qualify their next sets of bonds.