(1) Subject to these Regulations, an employment contribution shall be credited to an insured person who is a volunteer development worker, for any contribution week during the whole or any part of which he or she is under pensionable age and is -

(a) employed as such in a developing country, or

(b) engaged in preparatory training in the State prior to taking up employment in a developing country.

(2) Contributions credited under this article to a volunteer development worker who immediately prior to taking up employment in a developing country was a person in respect of whom employment contributions at any of the rates specified in article 81(2)(a), 82(2)(a) or 83(2)(a) were payable shall not be taken into account in relation to illness benefit,

health and safety benefit, adoptive benefit, paternity benefit, treatment benefit, maternity benefit or invalidity pension in respect of any period during which a person having ceased as a volunteer development worker, is in an employment in respect of which contributions at a rate specified in the said articles applies.