“An assessment period is a period of one month beginning with the first date of entitlement and each subsequent period of one month during which entitlement subsists.”
“The calculation of a person’s earned income in respect of an assessment period is, unless otherwise provided in this Chapter, to be based on the actual amounts received in that period.”
“9. In the case of Johnson, the Court of Appeal found the system to be irrational and unlawful in respect of employees paid monthly salary, where two monthly pay dates fall within the same assessment period. In the case of Pantellerisco, the court found that the principle identified in the Johnsoncase, as a matter of logic applied also in cases where a claimant is paid on a four weekly basis. 10. In the present case, the appellant is paid on a fortnightly basis. As a matter of logic there is no good ground for distinguishing the principles in Johnsonand Pantelleriscoto claimants who receive fortnightly payments. 11. The calculation required under the regulations is irrational and unlawful insofar as employees who are paid on a fortnightly basis are treated as having earned six weeks pay in one month.”
“(1) The threshold of irrationality in this case is high. …In the present case, the features of the scheme which result in the pay cycle effect reflect important policy decisions made by the Secretary of State. Those choices are explicit on the face of the Regulations, which were approved by both Houses of Parliament. (2) …it is often necessary in a complex scheme of this kind to apply general rules or principles which will sometimes produce harsh results in particular cases (“bright lines”, in the jargon): both Rose LJ and I made this point in Johnson – see paras. 72-73 and 113. However the threshold is defined, there will inevitably be UC claimants who miss out by a narrow margin.”
“79. …There is a real risk that any departure from the “actual receipts principle” will seriously impair the workability and reliability of the assessment of entitlement for this group of claimants. That being so, I do not think that it is open to the Court to hold that it is irrational for the Secretary of State not to have modified the effect of regulation 54 so as to eliminate or mitigate the pay cycle effect. 80. …deciding whether or to what extent to derogate from a general principle of this kind in order to address the interests of a particular group is quintessentially a question for the Secretary of State (with the assistance, of course, of her civil servants) and not the Court. It requires a detailed understanding of a highly complex scheme, and the technicalities of its administration, which the Court does not have, so as to be able to assess the advantages and disadvantages of implementing any particular solution. It will also ultimately require the striking of a balance between those advantages and disadvantages, which is an exercise of judgment that is the province of the legislator. If it were established that there was a straightforward solution which it was irrational for the Secretary of State not to have pursued the Court could and should nevertheless intervene; but that is not the case. … 82. It should be clear from the foregoing that the similarity between this case and Johnson is superficial. In the first place, the claimants’ challenge in Johnson was not directed at any fundamental feature of the scheme of the Regulations. They were entitled to be paid by the calendar month, which is the assessment period prescribed by the Regulations and which it is the policy of the Secretary of State to encourage. The problem only arose because of the quirk of their periodically, as I put it at para. 114 of my judgment, “[receiving] salary in the ‘wrong’ month because of the mechanics of bank payment”