Can I change my own Party ID?

No, once you have acceded to the BSC with a particular Party ID you will not be able to change it unless you follow the Market Exit Process to remove it and then begin the Market Entry Process again, to introduce a new Party ID.  You may change your company name as long as the company number remains the same. If your company number changes you must either novate the Party ID to the new company number or withdraw the old company and start the Market Entry Procedures for the new company.