working principle(n = noun.cognition) working rule - a rule that is adequate to permit work to be done;
is a kind of regulation, rule

accounting principle, archimedes' principle, basic principle, bitter principle, exclusion principle, first principle, fundamental principle, gestalt principle of organization, guiding principle, huygens' principle of superposition, in principle, in working order, indeterminacy principle, judicial principle, le chatelier principle, le chatelier's principle, le chatelier-braun principle, legal principle, life principle, localisation principle, localization principle, mass-action principle, moral principle, pauli exclusion principle, pleasure principle, pleasure-pain principle, pleasure-unpleasure principle, principle, principle of equivalence, principle of liquid displacement, principle of parsimony, principle of relativity, principle of superposition, reality principle, superposition principle, uncertainty principle, vital principle, working, working agreement, working capital, working class, working day, working dog, working girl, working group, working man, working memory, working out, working papers, working party, working person, working rule