The Motor Cycles (Protective Helmets) Regulations 1980,S.I.  1980/1279,
The Motor Cycles (Protective Helmets) (Amendment) Regulations 1981,S.I.  1981/374,
The Motor Cycles (Protective Helmets) (Amendment) Regulations 1986,S.I.  1986/472,

1,11th January 1957,
2,23rd November 1959,
3,27th February 1962,
4,11th June 1964,
5,13th March 1968,
6,18th February 1972,

1,29th May 1963,
4,3rd December 1965,
5,13th March 1968,
6,10th August 1971,
7,3rd January 1972,
8,15th May 1973,
9,1st February 1974,
10,2nd September 1974,
11,1st March 1975,

1,29th May 1963,
2,22nd February 1965,
3,7th December 1965,
4,22nd July 1966,
5,10th August 1971,
6,3rd January 1972,
7,1st February 1974,
8,1st March 1975,

1,12th December 1972,
2,26th January 1973,
3,1st February 1974,
4,2nd September 1974,
5,1st March 1975,

1,30th September 1977,
2,31st August 1978,
3,31st August 1979,
4,29th February 1980,

1,30th September 1977,
2,31st August 1978,
3,31st August 1979,
4,29th February 1980,

1,30th September 1977,
2,31st August 1978,
3,31st August 1979,
4,29th February 1980,
5,27th February 1981,

1,30th September 1977,
2,31st August 1978,
3,31st August 1979,
4,29th February 1980,
5,27th February 1981,

1,28th February 1986,