Relevance
Evidence is considered in relation to the population, product, exposure, outcome and decision addressed by the standard.
Standards development
The standards process is designed to produce relevant, technically credible and implementable requirements while protecting the integrity of final approval.

Development procedure
The need, intended outcome, users, boundaries, legal context, resource implications and relationship to existing standards are defined.
Appropriate expertise and stakeholder perspectives are appointed under competence, balance, confidentiality and conflict requirements.
Requirements and rationale are developed with reference to relevant research, practice, regulation, feasibility and identified risk.
Materially affected parties are given an appropriate opportunity to comment; submissions and dispositions are documented.
The draft, evidence base, consultation record and unresolved issues are examined before approval is considered.
An authorised body determines the outcome and controls the final text, version, effective date and transition arrangements.
Interpretations, implementation experience, complaints, new evidence and external change inform continuing review.
Evidence principles
Evidence is considered in relation to the population, product, exposure, outcome and decision addressed by the standard.
Study design, methods, bias, consistency, precision and applicability are weighed rather than reduced to source hierarchy alone.
Conclusions consider the body of relevant evidence, material uncertainty and credible alternative interpretation.
Requirements must be sufficiently clear, measurable and proportionate for their intended users and assurance model.
Change control
Corrections, amendments and new editions are classified according to their effect. The Association determines whether transition arrangements, reassessment or updated evidence are required for existing certificate and licence holders.
Emergency action may be taken where credible evidence indicates a material risk to safety, legality or the integrity of an Association programme. Such action remains subject to recorded authority and subsequent review.
Public participation
Consultation responses should be evidence-based, specific to the proposed text and submitted within the stated scope and period.