Element codes (ELCODEs) for any nonstandard state or provincial community Elements (i.e., Elements tracked in the state/province but not recognized in the International Ecological Classification Standard (IECS) were to be designated by the subnational agencies.
Although many states/provinces already had codes for subnational nonstandard Elements, the following convention may have been employed in the absence of a pre-existing practice: the Element code would begin with the string CE + state postal abbreviation and, like the code for standard Elements, would end with sequential numbers with leading zeros (e.g., CENY000001, CENY000002, CENY000003,...).