(1) This section shall apply to -
(a) any amendment to the rules of a scheme, and
(b) any exercise of any discretionary power under a scheme,
which has the effect of augmenting the benefit of any member or members so as materially to alter the balance of interests between the members, or between the members and the employer or employers (other than an amendment or exercise made or done pursuant to section 50) which is made or done -
(i) within twelve months before or six months after -
(I) the making of a bulk transfer within the meaning of section 59E,
(II) the making of an agreement or arrangement relating to or connected with the sale of all or part of the business or interests of a person, being the employer of any employees who are members of the scheme,
(III) the making of an agreement or arrangement relating to or connected with the purchase by a person, being the employer of any employees who are members of the scheme, of all or part of the business or interests of another pers
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