Sustainable Food policy

Hi we are a state agency and usually aren't able (by law) to provide food for ourselves with taxpayer funds, nor do we have a cafeteria. However, there are some occasional opportunities such as Employee Recognition when we are able to have food provided. I have two questions: 1) Are occasional opportunities such as this (once or twice per year) enough to document in an attempt to receive the credit? and 2) There is no policy template or apparent requirement for a written Sustainable Food policy. Do I tack MRc5 onto the MR Sustainable Purchasing prerequisite and start documenting? We have a documentation opportunity coming up next month. Thanks.