970 C.M.R. 1.10
(2) For the purpose of 970 CMR 1.10, the word “accounts” shall include all accounts, records and other documents including, but not limited to, correspondence and fund raising materials, maintained or required by M.G.L. c. 55, M.G.L. c. 55C or 970 CMR by the candidate or candidate committee whether in written, electronic or other form. In addition, accounts shall include, but are not limited to:
(4) (a) The purpose of each expenditure shall be reported in sufficient detail to ensure accurate and complete disclosure. Examples of such detail include the following: