A local council wishes to improve its housing allocation process. The following notes were made by the head of housing about the current process.

Housing application decision are made using a set of criteria based on a range of factors, including the length of time application has been on the waiting list and the number of dependents they have. The criteria by the council housing committee, who meet on a regular basis and seek to ensure that the criteria continue to enable effective housing allocation.

Occasionally, legislation ensuring protection for the most vulnerable people in our society can affect the criteria, as can changes issued by central government concerning practical issues, such as building regulations?

Which of the following types(s) of business rule has been described in this extract?