I was a bit surprised to read this under Pine forest event info
Under IOA rules, whistles are compulsory for your safety.
So I looked up the rules
Under rule 9.1 Dress and Equipment
A whistle should always be carried, and shall only be used in an emergency. Controllers having regard to the nature of the terrain or weather conditions may give notice that a whistle shall be carried by all competitors. In such circumstances a Competitor not carrying a whistle shall not be permitted to start the race.
So its the interpretation of \"should\" and \"shall\"
\"Should\" is not compulsory but \"shall\" is.
I have no issue with whistles being compulsory for Pine forest, I have issue that they are because it\'s an IOA rule, which in my opinion they are not.