Exhibit 5.1
CONSENT OF INDEPENDENT ACCOUNTANTS
The Sponsors and Trustee of
Municipal Investment Trust Fund--Multistate Series--310 (California Insured
Intermediate, New York Insured and Pennsylvania Insured Trusts), Defined Asset
Funds
We consent to the use in this Post-Effective Amendment No. 3 to Registration
Statement No. 333-23335 of our opinion dated June 26, 2000 appearing in the
Prospectus, which is part of such Registration Statement, and to the reference
to us under the heading "How The Fund Works--Auditors" in such Prospectus.
DELOITTE & TOUCHE LLP
New York, N.Y.
July 12, 2000
