Public law is sometimes said to deal with distributive justice. Such allocation issues are at least very dominant when public authorities grant only a limited number of public rights (authorizations, subsidies, etc.) and the number of applicants exceeds this maximum. The characteristics common to these ’limited public rights’ raise the question whether there are some general allocation rules applying to any allocation of limited public rights. This article shows how economic allocation theory can be helpful in constructing general allocation rules as a corollary of general legal principles. Allocation theory turns out to provide for general concepts and results clarifying general allocation rules and revealing mutual connections. Extending this allocation perspective from limited public rights to public law in general requires the hidden allocation issues in public law to be unveiled.