In his Gold Medal Address Mr Moss said the 13 accrediting bodies overseeing the introduction of DECs expected to generate £1.2 million from completing the 40,000 DECs that they anticipated would be required in their first year.
But the number needed by the October 2008 deadline was cut to 10,000 in June when the Department of Communities and Local Government said campus-style sites, including hospitals, were allowed to produce a single DEC instead of a DEC for each building.
Mr Moss said this could mean some accreditation bodies would not be able to continue, while Cibse had to cover a shortfall in its budget of £120,000.
He said: “Accreditation bodies invested heavily to deal with the original high estimates they were given. In the case of the institution, money must now be withdrawn from learned society functions such as research and technical publications.”