The governor shall transmit to the legislature supplemental estimates for such appropriations as in the governor’s judgment may be necessary on account of laws enacted after transmission of the budget, or as the governor deems otherwise in the public interest. The governor shall accompany such estimates with a statement of the reasons therefor, including the reasons for their omission from the budget. Whenever such supplemental estimates amount to an aggregate which, if they had been contained in the budget, would have required the governor to make a recommendation for the raising of additional revenue, the governor shall make such recommendation.