Any change to the criteria is a matter for central, not local government, so your Member of Parliament is the appropriate person to contact about this issue.
Mater i’r llywodraeth ganolog, nid llywodraeth leol, yw newid y meini prawf felly eich Aelod Seneddol yw’r person priodol i gysylltu ag ef ynglŷn â hyn.