Page 28 - UK ADR Aerodrome Regulations (Consolidated) October 2021

Part AR - ANNEX II - Authority Requirements - Aerodromes

certification specifications applicable to the aerodrome, the CAA finalises the set of all applicable
certification specifications. This means that it may change and also add additional applicable
certification specifications to the applicant’s proposal; this is typically an iterative process.
ADR.AR.C.020 Certification basis
The certification basis is to be established and notified to an applicant by the CAA and shall consist of:
(a) the certification specifications issued by the CAA applicable to the design and the type of
operation of the aerodrome and which are effective on the date of application for that
certificate, unless:
(1) the applicant elects compliance with later effective amendments; or
(2) the CAA finds that compliance with such later effective amendments is necessary;
(b) any provision for which an equivalent level of safety has been accepted by the CAA to be
demonstrated by the applicant; and
(c) any special condition prescribed in accordance with ADR.AR.C.025, that the CAA finds
necessary to be included in the certification basis.
ADR.AR.C.020(a) AMC1 Certification basis
EFFECTIVE CERTIFICATION SPECIFICATIONS
(a) The certification specifications that the CAA should use to establish and notify the
certification basis to the applicant, should be those that were effective during the date of
the application.
(b) Notwithstanding paragraph (a) above, if at any point of the certification process the
applicant requests to use certification specifications which came into force after the filing
of his/her application, or the notification of the certification basis by the CAA then the CAA
should examine if it is necessary to also include in the certification basis other certification
specifications, which also came into effect after the filling of the initial application and which
are, in the opinion of the CAA, directly related to those certification specifications that have
been proposed by the applicant.
(c) Notwithstanding paragraph (a) and (b) above, the CAA may at any time, after the filing of
the application, decide to include in the certification basis any certification specifications
that it deems necessary.
ADR.AR.C.020(b) GM1 Certification basis
CERTIFICATION BASIS - PROPOSALS FOR EQUIVALENT LEVEL OF SAFETY
When the CAA assesses a proposal of an applicant who has requested to demonstrate an equivalent
level of safety, the CAA should pay, amongst others, particular attention to:
(a) the identification of the intent of the CAA’s certification specifications in question, and
assess if the proposal satisfies that intent;
(b) any possible interconnections/relationships between the CAA’s certification specifications
which the proposal is related to, with any other certification specifications or requirements,
in order to:
(1) identify any implications of the proposal to other design, operational, human, or other
elements of the system; and
(2) establish if such interconnections/relationships and implications have been properly
and adequately addressed by the applicant.
The applicant’s proposal may involve design, technical, procedural, or other suitable means.
The demonstration of an equivalent level of safety may involve various methodologies, quantitative or
qualitative, whose magnitude and complexity may vary, depending on each case.
In any case, the applicant should demonstrate to the satisfaction of the CAA that the proposed solution
offers a level of safety, which is effectively not lower than that associated with the relevant CAA
certification specifications.
ADR.AR.C.020(b);(c) AMC1 Certification basis
CASES OF EQUIVALENT LEVEL OF SAFETY AND SPECIAL CONDITIONS
When deciding on cases of equivalent safety or special conditions and their respective underpinning
justification material, the CAA may consider whether any of the applicable certification specifications
compares to a Standard or a Recommended Practice and their different implications foreseen by the
ICAO Convention and its Annexes.
ADR.AR.C.025 Special conditions
(a) The CAA shall prescribe special detailed technical specifications, named special
conditions, for an aerodrome, if the related certification specifications issued by the CAA
referred to in point ADR.AR.C.020 are inadequate or inappropriate, to ensure compliance
with the essential requirements of Annex Va to Regulation (EC) No 216/2008, because:
(1) the certification specifications cannot be met due to physical, topographical or
similar limitations related to the location of the aerodrome;
(2) the aerodrome has novel or unusual design features; or
(3) experience from the operation of that aerodrome or other aerodromes having similar
design features has shown that safety may be endangered.
(b) The special conditions shall contain such technical specifications, including limitations or
procedures to be complied with, as the CAA finds necessary to ensure compliance with
the essential requirements set out in Annex V a to Regulation (EC) No 216/2008.
ADR.AR.C.035 Issuance of certificates
(a) The CAA may require any inspection, test, safety assessment, or exercise it finds
necessary before issuing the certificate.
(b) The CAA shall issue either:
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