In terms of protocol, the governor, together with the Puerto Rico Office of Management and Budget (OGP in Spanish), formulates the budget he believes is required to operate all government branches for the ensuing fiscal year. He then submits this formulation as a budget request to the Puerto Rican legislature before July 1, the date established by law as the beginning of Puerto Rico's fiscal year. While the constitution establishes that the request must be submitted "at the beginning of each regular session", the request is typically submitted during the first week of May as the regular sessions of the legislature begin in January and it would be impractical to submit a request so far in advance. Once submitted, the budget is then approved by the legislature, typically with amendments, through a joint resolution and is referred back to the governor for his approval. The governor then either approves it or vetoes it. If vetoed, the legislature can then either refer it back with amendments for the governor's approval, or approve it without the governor's consent by two-thirds of the bodies of each chamber.