301.03    Mark Filed Under the Madrid Protocol is Subject to Opposition

15 U.S.C. § 1141h(a)(2)  [Trademark Act § 68(a)(2)] Subject to the provisions of subsection (c) of this section, a request for extension of protection under this title shall be subject to opposition under section 1063 of this title.

A request for extension of protection of an international registration to the United States, filed under Trademark Act § 66(a), 15 U.S.C. § 1141f(a)  ("the Madrid Protocol"), is examined as an application for registration on the Principal Register. Thus, an application whose filing basis is Trademark Act § 66(a), 15 U.S.C. § 1141f(a), is subject to opposition under Trademark Act § 13, 15 U.S.C. § 1063.