37 Construction, maintenance and construction project management services in the fields of communications and transport infrastructures, natural resources, solar facilities, power generation and sustainable energy technology development; consulting services for the construction of projects for the utilization of natural resources, power generation and sustainable energy technology development; development of land, namely, planning and laying out of commercial, agricultural, residential or industrial buildings; infrastructure project development, namely, consulting services for the construction of infrastructure facilities in the fields of energy production and conservation, natural resources and infrastructure development projects