Several years ago, the joint task groups for ASTM C926 and ASTM C1063 determined that Section A2.2.2 in ASTM C926 was confusing. Furthermore, the language included references to accessories and practices that were better suited in ASTM C1063.
Section 184.108.40.206 was recently added to ASTM C1063:
220.127.116.11 Where vertical and downward facing horizontal exterior weather-exposed plaster surfaces meet, provide means to facilitate drainage.
This text, provided above for reference purposes only, offers more concise and appropriate language thereby negating the need for the antiquated language in ASTM C926. This ballot item deletes the old language in C926.