You need approval for changes that 'significantly' affect elements of your management system, including your Safety Management System.¹

We define these changes as 'significant' if they affect:

• the organisation chart
• policies
• safety culture²

Regulations

1. ADR.OR.B.040(a)(2)
2. ADR.OR.D.005(b)(1)&(2)

Changes to the operation that might change the terms of the certificate include:

• changes to the permanent level of protection of rescure and firefighting
• changes to low visibility procedures
• changes to the declared distances
• changes to the aerodrome coding
• changes to the Higher Code Aircraft (as applicable).

Any changes that impact the CB need our approval, including:

• constructions affecting sightlines from VCR
• developments on the movement are (e.g. new aprons)
• developments which might impact on the movement area (e.g. new or extensions to terminals or piers)

Note: Significant maintenance projects can have a secondary effect on the Certification Basis. If you're not sure if a maintenance project needs prior approval, notify your Aerodrome Inspector who can advise you.

Supporting documentation

When you apply for CB changes you need to include supporting documentation. Full details are in CAP 791, including a process for notifying us.

Regulations

1. ADR.OR.B.040
2. ADR.OPS.B.070

You also need to apply for approval for the following:

• changes that make use of an Alternative Means of Compliance
• changes to procedure that describe how changes not requiring prior approval are managed.