In order to maintain the reliability of data entered into the BREEAM In-Use Online Platform, any consumption-related data submitted must have a reporting period start date which is no more than one year prior to the start of the assessment (creation of a measurement).
For example, if the assessment was started on the 3rd of April 2018, the reporting period start date cannot be prior to 3rd of April 2017. A more recent period can always be entered, as long as the assessor can verify that the data is correct for the period entered.