Part SPA (Annex V to the EU No. 965/2012 regulation on air operations) is the part which houses information and regulations for operations which require special approvals (hence the name SPA).

This includes subparts:

A) .GEN - General Requirements
B) .PBN - Performance Based Navigation (PBN) Operations
C) .MNPS - Operations with specified Minimum Navigation Performance (MNPS)
D) .RVSM - Operations in airspace with Reduced Vertical Separation Minima (RVSM)
E) .LVO - Low Visibility Operations
F) .ETOPS - Extended Range Operations with Two-Engined Aeroplanes
G) .DG - Transport of Dangerous Goods
H) .NVIS - Helicopter Operations with Night Vision Imaging Systems
I) .HHO - Helicopter Hoist Operations
J) .HEMS - Helicopter Emergency Medical Service Operations
K) .HOFO - Helicopter Offshore Operations
L) .SET-IMC - Single-Engined Turbine Aeroplane Operations at Night or in Instrument Meteorological Conditions
M) .EFB - Electronic Flight Bags

An operator can be approved for operations partially covered by a specific section of Part-SPA. The regulation and associated AMCs and guidance materials define the priveleges of each approval, and how the operator must operate to apply and maintain that approval.

The option "any specialised operation where the aircraft is used for specialised activities." looks incorrect to us, as Part-SPA does not define each individual flight/operation, but instead lays out the framework for operators to operate under each approval. It is quite difficult to describe, but we highly recommend taking a quick look at EASA's easy access rules for air operations, part-SPA, where you can have a look at the rules and regulations yourself, and get a good idea of what they are used for.