3-736 DISCUSSION. This section and sections 4, 5, and 6 of Volume 3, Chapter 18, discuss each standard template available for issuance by the automated Operations Safety System (OPSS), also known as the Web‑based Operations Safety System (WebOPSS). These templates are more commonly referred to as “paragraphs.” The standard paragraphs discussed in this order are limited to operations in accordance with Title 14 of the Code of Federal Regulations (14 CFR) parts 91, 91 subpart K (91K), 121, 125 (including Letter of Deviation Authority (LODA) holders (125M)), 135, and 145.
A. Definition of OpSpecs. The standard paragraphs for parts 121, 125, 135, and 145 are called operations specifications (OpSpecs).
B. Definition of MSpecs. The standard paragraphs for part 91K are called management specifications (MSpecs).
C. Definition of LOAs. The standard paragraph for part 91 and 125M are called letters of authorization (LOA).
FAA documentation