# Commission Implementing Regulation (EU) 2019/2153 of 16 December 2019 on the fees and charges levied by the European Union Aviation Safety Agency, and repealing Regulation (EU) No 319/2014, Division (9): In Tables 2 and 3 of Part I of the Annex, ‘Simple’, ‘Standard’, ‘Significant’ and ‘Complex Significant’ refer to the following:

Extent: E+W+S+N.I.

Simple
Standard
Significant
Complex Significant
EASA Supplemental Type Certificate (STC)
STC, major design change, or repair, only involving current and well-proven justification methods, for which a complete set of data (description, compliance check-list and compliance documents) can be communicated at the time of application, and for which the applicant has demonstrated experience, and which can be assessed by the project certification manager alone, or with a limited involvement of a single discipline specialist
All other STCs, major design changes or repairs
‘Significant’ is defined in point 21.A.101(b) of Annex I (Part 21) to Regulation (EU) No 748/2012 (and similarly in FAA 14CFR 21.101 (b)).
‘Complex Significant Change’ is any significant change (ref. GM 21.A.101 of Annex I (Part 21) to Regulation (EU) No 748/2012) involving at least two reasons justifying its classification as significant (examples of criteria as per this GM 21.A.101 of Annex I (Part 21) to Regulation (EU) No 748/2012: change in the general configuration, change to the principles of construction, assumptions used for certification have been invalidated)
or
any significant change involving two or more examples described as significant change (column ‘Description of change’ Tables in Appendix 2 to GM 21.A.101 of Annex I (Part 21) to Regulation (EU) No 748/2012).
If justified by exceptional technical circumstances, the Agency may reclassify a complex significant application to significant.
EASA major design changes
EASA major repairs
n/a
n/a

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Source: https://www.legislation.gov.uk/eur/2019/2153/annex/part/V/division/9 (the official version)
Page: https://openlegislation.uk/eu-regulation-2019-2153/annex/part-V/division-9
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.