This section has been modified at the state or city levels. Section 101 contains provisions from other referenced codes, notably 101.4.5 for 527 CMR. Structures or sections of structures must be classed in one or more of the occupation groups indicated below. The classification should reflect the nature and use of the property. Structural types include buildings, bridges, fences, signs, towers, and tunnels. The presence of machinery, equipment, or materials within a structure may cause them to be classified in more than one structural group. For example, an office building would be classified in both the Manufacturing and the Office sectors. OCCUPATIONS ARE CASES WHERE IT IS IMPERATIVE TO CLASSIFY SOME TYPE OF PROFESSION. FOR EXAMPLE, A DOCTOR'S OFFICE OR CLINIC IS ASSIGNED TO THE Medical Sector, EVEN THOUGH IT MAY ALSO BE USED AS AN ADMINISTRATIVE OFFICE. THE CASE CANNOT BE DECIDED BASED ON THE USE OF THE SPACE ONLY, BUT MUST BE LOOKED AT IN RELATION TO THE PRESENT LAW AND REGULATIONS GOVERNING THE SECTOR. The following occupation groups have been adopted by the MA Department of Housing and Community Development (DHCD). DHCD is the agency responsible for administering the MA State Building Code (SBC) and the MA Uniform Construction Code (UCC).