37 Construction advisory services, technical advisory services in the field of construction materials and fittings, namely, cementitious materials, wood, metal, plastics and composites thereof; Construction advisory services in the fields of construction location, construction structure and building maintenance and repair, all such services being in relation to portable, relocatable, fixed, and permanent buildings, structures and units, namely, modular buildings, structures in the nature of and units, and prefabricated buildings, structures and units; Construction of portable, relocatable, fixed, and permanent buildings, structures and units, namely, modular buildings, structures in the nature of general purpose commercial, industrial and storage facilities, and units in the nature of general purpose commercial, industrial or storage units; Supervision of the construction and erection of portable, relocatable, fixed, and permanent buildings, structures and units, namely, modular buildings, structures in the nature of general purpose commercial, industrial and storage facilities, and units in the nature of general purpose commercial, industrial or storage units, and prefabricated buildings, structures in the nature of general purpose commercial, industrial and storage buildings, and units in the nature of general purpose commercial, industrial or storage units; Construction project management; Installation of electrical systems, windows, plumbing systems, interior refurbishment, and painting of portable, relocatable, fixed, and permanent buildings, structures and units, namely, modular buildings, structures and units, and prefabricated buildings, structures and units