Section 19.23 - Applicability of provisions concerning Notice of Disagreement(a) Appeals governed by § 19.21(a) shall be processed in accordance with § 19.24 . Sections 19.26 and 19.28 shall not apply to appeals governed by § 19.21(a) .(b) Appeals governed by § 19.21(b) shall be processed in accordance with §§ 19.26 and 19.28 . 79 FR 57697 , Sept. 25, 2014, as amended at 84 FR 178 , Jan. 18, 2019