Cafodd yr amodau o ran 'ychwanegedd' eu cytuno rhwng Llywodraeth Cymru, Cymdeithas Prif Swyddogion Heddlu Cymru, yr Heddlu Trafnidiaeth Prydeinig, ac Awdurdodau Heddlu Cymru wrth sefydlu Rhaglen Swyddogion Cymorth Cymunedol a datblygu Telerau ac Amodau'r Grant ar gyfer Swyddogion Cymorth Cymunedol.  Roedd pob un o Awdurdodau'r Heddlu wedi cytuno'n ffurfiol â'r amodau hyn fel rhan o gynnig cychwynnol y grant, ac yn dilyn hynny roedd Comisiynwyr Heddlu a Throseddu wedi cadarnhau eu bod yn derbyn yr amodau hefyd.
These ‘additionality’ conditions were agreed between the Welsh Government, the Association of Chief Police Officers (ACPO) Cymru, British Transport Police and the Police Authorities Wales during the establishment of the CSO Programme and the development of the Terms and Conditions for the CSO Grant.  Each Police Authority formally agreed these conditions as part of the initial grant offer, and subsequently PCCs also confirmed their acceptance.