Edward Douglass White, United States Siegel v. Thoman…
“ To prevent the general limitation dedicating each year's revenues to each year's debts from operating to prevent the surplus from being applied to debts of previous years, should the city so desire, the law said the city 'may' so use it.It is familiar doctrine that, where a statute confers a power to be exercised for the benefit of the public or of a private person, the word 'may' is often treated as imposing a duty, rather than conferring a discretion. ”
