In this Act the following expressions have the meanings hereby respectively assigned to them, that is to say:—
" agency for the supply of nurses " means the business (whether or not carried on for gain and whether or not carried on in conjunction with another business) of supplying persons to act as nurses, or of supplying persons to act as nurses and persons to act as midwives, but does not include the business carried on by any county or district nursing association or other similar organisation, being an association or organisation established and existing wholly or mainly for the purpose of providing patients with the services of a nurse to visit them in their own homes without herself taking up her residence there;
" certified midwife " means a woman who is for the time being certified under the Midwives Act, 1951, and includes a woman who, by virtue of an order made under Defence Regulations, is for the time being deemed for the purposes of subsection (2) of section twenty-three of the National Health Service Act, 1946, to be a certified midwife;
" enrolled assistant nurse " means a person enrolled in the roll of assistant nurses maintained in pursuance of subsection (1) of section two of the Nurses Act, 1957;
" the Minister " means the Minister of Health;
" nurse " means a nurse for the sick and " registered nurse " means a nurse registered in the register of nurses maintained in pursuance of subsection (1) of section two of the Nurses Act, 1957.