The local rules are important documents that all players and officials must read.
BHA Competition Rules & Requirements
Competition Rules & Requirements - 2021 v1
The above link should open the latest version in your browser of choice with a "clickable" Table of Contents.
Right-click this link to download a copy.
Masters' Specific Rules - within the Competition Rules and Requirements (see link above) the section titled "2.19 Masters Hockey League (MHL)" contains a number of requirements that are specific to the Masters Competition.