Baltimore City Code, Building Codes, Part III, Sections 90.1 to 90.4
Sections 90.1 to 90.4.
{As in NEC}
Introduction
Baltimore City Code div. Building Codes, pt. III, div. Introduction, art. 90
in effectBaltimore City Code, Building Codes, Part III, Section 90.5 Mandatory Rules, Permissive Rules, and Explanatory Material.
Section 90.5. Mandatory Rules, Permissive Rules, and Explanatory Material.
(A) Mandatory Rules.
Mandatory rules of this Code are those that identify actions that are specifically required or prohibited and are characterized by the use of the following terms:
(1) for imposing a duty or condition precedent, “shall” or “must”, and
(2) for prohibiting action, “shall not”, “may not”, or “no ... may”.
(B) Permissive Rules.
Permissive rules of this Code are those that identify actions that are allowed but not required, are normally used to describe options or alternative methods, and are characterized by the use of the following terms:
(1) for discretionary authority, “shall be permitted”, “is permitted”, or “may”, and
(2) for negating a duty or condition precedent, “shall not be required”, “is not required”, or “need not”.
(C) Explanatory Material. {As in NEC}
(D) Informative Annexes. {As in NEC}
Baltimore City Code, Building Codes, Part III, Sections 90.6 to 90.9
Sections 90.6 to 90.9.
{As in NEC}
Source: City of Baltimore Department of Legislative Reference, City of Baltimore Law Library (codes.baltimorecity.gov; Open Law Library bulk XML)URL: https://codes.baltimorecity.gov/us/md/cities/baltimore/code/building-codes/III/introduction/90Fetched: 10/25/2026