Are non-TR receps required to be TR receps when replaced?
I think that they SHOULD but that is not how I read:
Ohio (IRC based):
115.2 Maintenance.
Residential buildings, structures and the building equipment shall be maintained in a safe and sanitary condition and in accordance with the condition(s) established in current and any previous plan approvals and certificates of occupancy. Devices or safeguards which are required by this code shall be maintained in conformance with the code edition under which installed. The owner or the owner's designated agent shall be responsible for the maintenance.
So I think that non TR recpts could be used.
115.4 Additions and alterations.
Additions or alterations to residential buildings shall conform to the requirements of the code for new construction and shall be approved by the residential building official. Additions or alterations shall not be made to an existing building or structure which will cause the existing building or structure to be in violation of any provisions of this code. Except as otherwise provided for in Section R313.1.1, portions of the structure not altered and not affected by the alteration are not required to comply with the code requirements for a new structure.
Now for additions or alterations then yes.