law: Petroleum Act, 1934
  21. Power to make rules regarding tests
  The Central Government may make rules-
  (a) for the specification, verification, correction and
  
  replacement of the Standard Test Apparatus;
  (b) prescribing fee for the inspection of the standard Test Apparatus;
  
  
  (c) regulating the procedure in comparing a test apparatus with
  
  the Standard Test Apparatus;
  (d) prescribing the form of certificate to be given in respect
  
  of a test apparatus so compared, and the period for which such certificates
  
  shall be valid; 
  (e) prescribing the form of the register of such certificates;
  (f) prescribing fee for comparing a test apparatus with the
  
  Standard Test Apparatus;
  (g) regulating the procedure of testing officers in carrying out
  
  tests of petroleum, providing for the averaging of results where several
  
  samples of the same petroleum are tested, and prescribing the variations from
  
  standard temperatures which may be allowed;
  (h) prescribing the form of certificates of tests of petroleum
  
  and the fees which may be charged therefor;
  (i) providing, where the results of the testing of samples raise
  
  a doubt as to the uniformity of the quality of the petroleum in any lot under
  
  test, for the division of the lot into sub-lots, and for the selection and
  
  testing of samples of each sub-lot and for the averaging of results in
  
  accordance with the results of tests of those samples;
  (j) prescribing fees for re-tests under section 20 and providing
  
  for their refund where the original test was erroneous; and 
  (k) generally, resulting the procedure of all offices performing
  
  duties connected with the testing of petroleum, and providing for any matter
  
  incidental to such testing.