OSHA Training and education. 1910.157(g) :

1910.157(g)(1) 
Where the employer has provided portable fire extinguishers for employee use in the workplace, the employer shall also provide an educational program to familiarize employees with the general principles of fire extinguisher use and the hazards involved with incipient stage fire fighting.

1910.157(g) (2) 
The employer shall provide the education required in paragraph (g)(1) of this section upon initial employment and at least annually thereafter.

1910.157(g) (3) 
The employer shall provide employees who have been designated to use fire fighting equipment as part of an emergency action plan with training in the use of the appropriate equipment.

1910.157(g) (4) 
The employer shall provide the training required in paragraph (g)(3) of this section upon initial assignment to the designated group of employees and at least annually thereafter.

[45 FR 60708, Sept. 12, 1980; 46 FR 24557, May 1, 1981, as amended at 51 FR 34560, Sept. 29, 1986; 61 FR 9227, March 7, 1996; 67 FR 67964, Nov. 7, 2002]

For more information please visit the OSHA web site at: http://www.osha.gov/