Got the latest newsletter yesterday and going through and reviewing the 2011 Range Rules. Under Section III General Safety Rules a. Eleven fundamental rules for gun safety are: Number 8 reads: "Wear eye and ear protection. (eye protection is mandatory)"
In the Board of Directors section on page 4 (opposite the 2011 Range Rules) there is a section titled "Eye and Ear Protection" that states "While at the CCGC ranges shooting; a Club requirement is that all individuals MUST (my emphasis added) wear eye and ear protection."
My suggestion would be to either change the aforementioned 2011 Range Rules to match the column or correct the newsletter so it matches the 2011 Range Rules.
Personally, I always wear both even when I am on the mower or trimming due to the noise levels and the danger of flying objects.