Regulation 9 Requirement for an accession State national subject to worker authorisation to be authorised to work
An accession State national subject to worker authorisation shall only be authorised to work in the United Kingdom during the accession period if he holds an accession worker authorisation document and is working in accordance with the conditions set out in that document.
For the purpose of these Regulations, an accession worker authorisation document is—
a passport or other travel document endorsed before 1st January 2007 to show that the holder has leave to enter or remain in the United Kingdom under the 1971 Act, subject to a condition restricting his employment in the United Kingdom to a particular employer or category of employment;
a seasonal agricultural work card, except where the holder of the card has a document mentioned in sub-paragraph (a) giving him leave to enter the United Kingdom as a seasonal agricultural worker; or
an accession worker card issued in accordance with regulation 11.
But a document shall cease to be treated as an accession worker authorisation document under paragraph (2)—
in the case of a document mentioned in paragraph (2)(a), at the end of the period for which leave to enter or remain is given;
in the case of a seasonal agricultural work card, at the end of the period of six months beginning with the date on which the holder of the card begins working for the agricultural employer specified in the card;
in the case of an accession worker card, on the expiry of the card under regulation 11(7).
For the purpose of this regulation—
“seasonal agricultural work card” means a Home Office work card issued by the operator of a seasonal agricultural workers scheme approved by the Secretary of State for the purpose of paragraph 104(ii) of the immigration rules;
the reference to a travel document other than a passport is a reference to a document which relates to a national of Bulgaria or Romania and which is designed to serve the same purpose as a passport.