“68.The question is raised whether (assuming that the 1993 Amendment is otherwise valid) having regard to the proviso to Rule 23, which invalidates the consent requirement as regards benefits entitlements accrued prior to the17th November 1993 (the date of the 1993 Deed), the consent requirements under the 1993 Deed are valid as regards benefits accruing thereafter (as the Claimant contends) or whether the consent requirements are incapable of severance and wholly invalid (as the Beneficiaries contend). 69. The Claimant is plainly correct. The 1993 Amendment must be construed as having effect subject to the overriding limitation on the power of amendment contained in the proviso. Questions of severance do not arise, but if they did the principles governing severance in a case such as the present (as the cited authorities establish) lead to the same conclusion. There is no requirement or scope for application of the ‘blue pencil’ test deleting what is objectionable and leaving standing what is unobjectionable. All that is required is that the distinction between what is and what is not objectionable is clear and that the meaning and application of what is unobjectionable is clear.”