When presented or asked for. Bills or notes that are payable when requested are known as demand notes. When the bank receives a demand note, it pays it, regardless of who the bearer may be. one person (man), one vote n. A 1964 decision in Reynolds v. Sims affirmed the principle (based on the Equal Protection Clause) that each legislative district should have, as closely as possible, the same number of voters. See also apportionment