
1 
These regulations may be cited as the Coal Mines (Precautions against Inflammable Dust) (Second Amendment) Regulations 1974 and shall come into operation on 1st February 1975.
2 
The Interpretation Act 1889 shall apply to the interpretation of these regulations as it applies to the interpretation of an Act of Parliament.
3 
The Coal Mines (Precautions against Inflammable Dust) Regulations 1956, as amended, shall have effect subject to the modifications specified in the Schedule to these regulations.
Alexander Eadie
Parliamentary Under Secretary of State
Department of Energy
16th December 1974
SCHEDULE
Regulation 3
1 
In regulation 3, for the words “two hundred and forty feet”, there shall be substituted the words “75 metres.”
2 
In regulation 4(b), for the words “thirty feet”, there shall be substituted the words “10 metres”.
3 
In regulation 6(a), for the words “60-mesh sieve of”, there shall be substituted the words “a sieve of which the nominal aperture size is 250 micrometres and which complies with”, and for the words “240-mesh sieve of”, there shall be substituted the words “a sieve of which the nominal aperture size is 63 micrometres and which complies with”.
4 
In regulation 7(2), for the words “six hundred feet”, there shall be substituted the words “180 metres”, and for the words “ten per mile”, there shall be substituted the words “6 per kilometre”.
5 
In regulation 8—
(a) in paragraph (1)—
(i) in sub-paragraph (a), for the words “one hundred and fifty feet”, there shall be substituted the words “45 metres”,
(ii) in sub-paragraph (b), for the words “a quarter of an inch”, there shall be substituted the words “6 millimetres”, and for words “one inch”, there shall be substituted the words “25 millimetres”;
(b) in paragraph (4), for the words “a quarter of an inch”, there shall be substituted the words “6 millimetres”,
(c) in paragraph (5)—
(i) in sub-paragraph (a), for the words “fifteen feet”, there shall be substituted the words “5 metres”,
(ii) in sub-paragraph (b), for the words “three feet”, there shall be substituted the word “metre”.
6 
In regulation 9, for the words “60-mesh sieve of”, there shall be substituted the words “a sieve of which the nominal aperture size is 250 micrometres and which complies with”.
7 
In regulation 10A—
(a) in paragraph (1), the words “stone dust” shall be omitted, and after the word “barriers”, there shall be inserted the words “to the extension of that flame”;
(b) in paragraph (5), for the words “one hundred and fifty feet” (in both places where they appear), there shall be substituted the words “45 metres”.