(1) Subject to this Act -

(a) every person -

(i) over the age of 16 years and under pensionable age, or

(ii) born on or after 1 January 1958, who has attained pensionable age but has neither attained the age of 70 years nor been awarded a State pension (contributory),

(not being a person included in any of the classes of person specified in Part 3 of Schedule 1) who has reckonable income or reckonable emoluments, shall be a self-employed contributor for the purposes of this Act regardless of whether the person is also an employed contributor,

(b) every person becoming for the first time a self-employed contributor shall become insured under this Act and shall thereafter continue throughout his or her life to be so insured, and

(c) in the case of a person who, not having been an employed contributor at any time, becomes for the first time a self-employed contributor, the first day of the contribution year in which the person becomes a self-employed contributor shall be regarded as the date of entry into insurance.