A service provider may appeal the denial of vendorization by a regional center, and perceived non-compliance with the vendorization regulations by regional centers, or the setting of a rate by the Department. There are also appeal provisions for audits. It is probably best to refer to regulations for the specifics of each type of appeal. (Title 17, Sections: Vendorization appeals, 54380, 54382, 54384, 54386, 54388, 54390; Rate appeals, 57940, 57941, 57942, 57944, 57946, 57948; Audit appeals, 50730, 50731, 50732, 50750 50751, 50752, 50753, 50754, 50755)