The pnt_locking table attribute enables and disables partition level locking with sp_chgattrbute. By default, partition locking is disabled.
sp_chgattribute objectname, 'ptn_locking’, value
sp_chgattribute authors, "ptn_locking", 1
sp_chgattribute authors, "ptn_locking", 0
Only the object owner can execute sp_chgattribute.