Section 33B requires that Scottish Ministers must, within 12 months beginning with the day after Royal Assent, introduce regulations under Section 1 of the 2003 Act to make provision for the installation of an average of one integral swift nest box per dwelling or unit greater than five metres in height and in accordance with “best practice guidance except where such installation is not practicable or appropriate”, “best practice guidance” is defined as meaning British Standard BS 42021: 2022.