Is "will" a common word in your rules and do we have to follow whatever is after?
Alas, you have stumbled into a minefield.
Essays can be, and have been, written about the subtleties of the usage of "will" and "shall", including one on the implications for the United States Constitution!
As a general rule, "shall" used in the third person normally indicates a command. Substituting "will", on the other hand, makes the meaning potentially ambiguous - it can still have the same meaning as "shall" in a given context, but alternatively it may simply mean, for example, an intention or a habitual action (although neither of those meanings is particularly appropriate in your context, so it would be reasonable to read "will" as "shall" here).