Dylai Sefydliadau sydd o fewn y cwmpas hysbysu eu cyflenwyr presennol bod Polisi Dosbarthiadau Diogelwch y Llywodraeth wedi'i ddiwygio, gan nodi unrhyw newidiadau sydd eu hangen eu gwneud i’r contract.
In-Scope Organisations should notify existing suppliers that the Government Security Classification Policy has been updated and set out any changes needed to the contract.