42 
(d)  “nuclear site licence” has the meaning given in sec tion 1 of the Nuclear Installations Act 
1965(a). 
25.  An inspector from the Organisation for the Prohibi tion of Chemical Weapons, within the 
meaning given to “inspector” by section 24(e) of th e Chemical Weapons Act 1996( b), who has 
travelled to the United Kingdom for the purposes of an inspection. 
26. —(1) A person who is— 
(a)  carrying out a critical function at a space site or  spacecraft controller who is responsible 
for command and control of a launch vehicle or spac ecraft for nominal operations, 
collision avoidance or anomalies; or 
(b)  employed by, or contracted to provide services to, a person who operates or maintains 
space situational awareness capabilities, 
where they have travelled to the United Kingdom in the course of their work. 
(2)  For the purposes of sub-paragraph (1)— 
(a)  “space site” has the meaning given in paragraph 5(3 ) of Schedule 4 to the Space Industry 
Act 2018(c); 
(b)  “space situational awareness capabilities” means th e sensors, systems and analytical 
services needed to provide time-sensitive warnings of space weather events, orbital 
collisions, orbital fragmentations or the re-entry of man-made objects from orbit; 
(c)  “spacecraft” has the meaning given in section 2(6) of the Space Industry Act 2018; 
(d)  “spacecraft controller” means a person competent, a uthorised and responsible for 
maintaining safe and secure operation of spacecraft  through monitoring the status of a 
spacecraft, issuing manoeuvre commands or controlli ng other aspects of the spacecraft 
that influence its behaviour including its motion in space. 
27. —(1) A specialist aerospace engineer, or a speciali st aerospace worker, where they have 
travelled to the United Kingdom in the course of their work. 
(2)  For the purposes of sub-paragraph (1)— 
(a)  “specialist aerospace engineer” means a person who is employed or otherwise engaged to 
provide engineering services for the purpose of ens uring the continued operation of 
aviation activities (including but not limited to t he provision of maintenance and repair 
services for production lines, aviation components, grounded aircraft and new aircraft); 
(b)  “specialist aerospace worker” means a person who is  employed or otherwise engaged to 
provide services for the purpose of ensuring safety  management and quality assurance as 
required by relevant standards, guidance and public ations on aviation safety produced by 
the Civil Aviation Authority or the European Union Aviation Safety Agency(d). 
28. —(1) A person engaged in operational, maintenance o r safety activities of a downstream oil 
facility that has a capacity in excess of 20,000 tonnes, where— 
(a)  the downstream oil facility is engaged in a specifi ed activity carried on in the United 
Kingdom in the course of a business, and contributes (directly or indirectly) to the supply 
                                                                                                                                            
(a) 1965 c. 57. Section 1 was substituted by paragrap h 17 of Schedule 2 to the Energy Act 2013 (c. 32); by virtue of section 
1(2), a licence described in section 1(1) is referred to as a “nuclear site licence”. 
(b) 1996 c. 6. 
(c) 2018 c. 5. 
(d) The Civil Aviation Authority was established unde r section 1(1) of the Civil Aviation Act 1971 (c. 7 5). That Act was 
replaced by a consolidating statute, the Civil Avia tion Act 1982 (c. 16), section 2(1) of which provid es for the continued 
existence of the Civil Aviation Authority. There ar e amendments to section 2 but none is relevant. The  European Union 
Aviation Safety Agency was established by Regulation (EU) 2018/1139 of the European Parliament and of the Council of 4 
July 2018 on common rules in the field of civil avi ation and establishing a European Union Aviation Sa fety Agency, and