In the UK, the law relating to the maintenance of a personal logbook is contained in Article 28 of the ANO, which requires:
(a) the name and address of the holder of the log book;
(b) particulars of the holder’s licence (if any) to act as a member of the flight crew of an aircraft; and
(c) the name and address of his employer (if any).
(2) Particulars of each flight during which the holder of the log book acted either as a member of the flight crew of an aircraft or for the purpose of qualifying for the grant or renewal of a licence under this Order, as the case may be, shall be recorded in the log book at the end of each flight or as soon thereafter as is reasonably practicable, including:
(a) the date, the places at which the holder embarked on and disembarked from the aircraft and the time spent during the course of a flight when he was acting in either capacity;
(b) the type and registration marks of the aircraft;
(c) the capacity in which the holder acted in flight;
(d) particulars of any special conditions under which the flight was conducted, including night flying and instrument flying; and
(e) particulars of any test or examination undertaken whilst in flight.
(3) For the purposes of this article, a helicopter shall be deemed to be in flight from the moment the helicopter first moves under its own power for the purpose of taking off until the rotors are next stopped.
(4) Particulars of any test or examination undertaken whilst in a flight simulator shall be recorded in the log book, including:
(a) the date of the test or examination;
(b) the type of simulator;
(c) the capacity in which the holder acted; and
(d) the nature of the test or examination.
At present, neither the provisions of JAR-FCL 1 nor LASORS relating to the maintenance of logbooks are legally enforceable in the UK and both may be safely ignored. This may all change with the advent of EASA as anything that is taken into the EASA standard will become European law and will supersede the ANO.