opportunity areas The Secretary shall initially establish at least 2 aquaculture opportunity areas from the inventory developed under subsection (b) not later than 1 year after the date of enactment of this Act. Each year thereafter, the Secretary shall establish not less than 1 additional aquaculture opportunity area from the inventory until all sites from the inventory have been considered. (4) Adjustment of existing aquaculture opportunity areas The Secretary may adjust the dimensions of an established aquaculture opportunity area as necessary, while accounting for impacts to operating aquaculture facilities, the state of science, the cost-benefit ratio of the adjustment, and comments from aquaculture stakeholders and the general public. (g) Demonstration projects In order to test the viability of sustainable offshore aquaculture in a site listed on the inventory, the Secretary may support demonstration projects in an inventory site to assist in developing the required contents for an aquaculture management plan. Such demonstration projects shall be carried out in a manner that is consistent with the national standards in section 101. Demonstration projects may include multidisciplinary research to revive and adapt traditional aquaculture systems, such as open sea ponds, to support the needs of modern communities. (h) Study on aquaculture opportunity areas in State waters Not later than 18 months after the date of enactment of this Act, the Secretary shall conduct a study of the feasibility of allowing States to petition for aquaculture opportunity areas in their waters. The study shall include information and analysis on the benefits of aquaculture opportunity areas in State waters and identify barriers to implementation. (i) Regulations The Secretary may promulgate regulations governing the process for implementing this section. (j) Spatial data To support the implementation of this section, the National Oceanic and Atmospheric Administration shall collect and curate spatial data relevant to aquaculture and