1403.02 Amendment of Combined or Multiple-Class Application
An application under §1 or §44 of the Trademark Act may be amended during prosecution to delete, correct, or add classes, when appropriate.
In a §66(a) application, classes may be deleted, but classes may not be added, and goods/services may not be transferred from one class to another class. 37 C.F.R. §2.85(d); see TMEP §§1401.03(d), 1402.01(c), 1904.02(b), (c).