‘Renewable Energy Certificate or REC’.- means a personal property that constitutes a tradeable and negotiable asset or commodity that may be purchased, sold, assigned, and transferred between persons for any lawful purpose, which is integrally and inseparably equal to one (1) megawatt-hour (MWh) of electricity generated from a sustainable renewable energy source or alternative renewable energy source in Puerto Rico (issued and registered pursuant to this Act) and, in turn, represents all environmental and social attributes, as defined in this Act.