Entrenchment provisions in company articles require stricter amendment conditions and prescribed Registrar notice, and model articles may apply unless excluded. Articles must contain regulations for management and prescribed matters, follow forms in Schedule I, and may adopt applicable model articles; model regulations apply where not excluded. Articles may include entrenchment restricting alteration to conditions more onerous than a special resolution; entrenchment may be made on formation or amended with unanimous member agreement in a private company and by special resolution in a public company. Companies with entrenchment must notify the Registrar in the prescribed manner. Prior-law articles remain unaffected unless amended under this Act.