18. Asset and liability ratios and structures of authorised investment business firms.
(1) A supervisory authority may impose a requirement on an authorised investment business firm to keep at all times a proportion of its assets in the form of liquid assets so as to enable the authorised investment business firm to meet its liabilities as they arise.
(2) An authorised investment business firm may keep liquid assets in addition to those required for the purpose of complying with subsection (1) of this section.
(3) For the purposes of complying with the requirements of a supervisory authority under subsection (1) of this section, an authorised investment business firm shall have regard to the range and scale of its business and that of any relevant associated undertaking or related undertaking and the composition and character of its assets and liabilities and those of any such undertaking.
(4) A supervisory authority may from time to time impose a requirement on an authorised investment business firm to maintain -