What is meant by "supplementary or additional grants" in the context of the article?
In the context of this article, "supplementary or additional grants" refer to grants made by the President to cover excess expenditure on a particular service for the current financial year. These grants are given when the amount authorized by law is found to be insufficient for that year's purpose, or when a need has arisen for supplementary or additional expenditure upon some new service not contemplated in the annual financial statement.