In international law on treaties, the maxim 'Pacta tertiis nec nocent nec prosunt' means

Pacta tertiis nec nocent nec prosunt means that a treaty cannot impose obligations or confer rights on a third State without its consent. Treaty obligations ordinarily bind the parties, so both the parties-only statement and the absence of imposed third-State obligations express the principle. The consent qualification matters: a third State can accept an obligation under the Convention’s rules.