If you do not qualify for emergency benefits, DTA has to decide on your application and make sure you get your SNAP benefits within 30 days of your application date. The amount you get should be retroactive to the date you applied if you are found eligible. 106 C.M.R. § 361.700(A).
If DTA cannot decide on your application within 30 days of the day you applied because some required proofs are missing, DTA will deny your application and send you a notice of pending denial. If you give DTA the missing proofs within 60 days of applying, DTA must "reopen" your case. DTA cannot make you start a new application. See Question 8 (What if I am having trouble getting all the proofs, or the proofs get to DTA late?).