Moment encourages you to use checklists to make sure you have identified all necessary requirements. Then you have a powerful tool to make sure you document how requirements are fulfilled.
ISO 9000:2018
Fundamentals and vocabulary
Requirement = a need or expectation that is stated, generally implied or obligatory.
A requiment can become:
1) non-fulfilment of a requirement related to an intended or specified use (defect)
2) non-fulfilment of a requirement (nonconformity)
3) fulfilment of a requirement (conformity)
ISO 9001:2015 Quality management system requirements
8.2.2 When determining requirements for products and services to be offered to customers, the organization must ensure that all requirements are defined, including regulatory requirements.
Byggesaksforskriften (SAK10)
According to SAK10 §10-1 a you need to have a system that helps you to "Identify, address, verify and document compliance with relevant requirements".