NON-OBSERVANCE
n.Neglect or failure to observe or fulfill. Non obstante, [L. Notwithstanding, ] a clause in statutes and letters patent, importing a license form the king to do a thing which at common law might be lawfully done, but being restrained by act of parliament, cannot be done without such license.
non-observance
non-observance ▶noun [ mass noun ] failure to fulfil or comply with an obligation, rule, or custom.
non-observance noun society deems these rules so important as to lay down sanctions for non-observance. See violation (sense 1 ).