An authorized employee is a person who locks out or tags out machines or equipment in order to service or maintain them. The standard applies to controlling energy during servicing and maintenance. That includes lubrication, cleaning, unjamming, adjustments and tool changes where you may be exposed to unexpected startup or release of hazardous energy.

During normal production

Normal production operations are not covered. Servicing during production is covered if you must:

Remove or bypass a guard or other safety device, or
Put any part of your body into the point of operation or an associated danger zone during a machine operating cycle

Narrow exceptions:
1. Minor tool changes, adjustments and other minor servicing during normal production are not covered if they are routine, repetitive, and integral to using the equipment for production, and the work is done using alternative measures that provide effective protection.
2. Cord-and-plug equipment is not covered when unplugging it controls the hazard and the plug is under your exclusive control while you work.
3. Hot tap operations on pressurized pipelines carrying gas, steam, water or petroleum products are not covered when the employer demonstrates that continuity of service is essential, shutdown is impractical, and documented procedures and special equipment giving proven effective protection are used.

Outside this standard entirely: construction and agriculture employment; maritime employment covered by 29 CFR parts 1915, 1917 and 1918; installations under the exclusive control of electric utilities for power generation, transmission and distribution; exposure to electrical hazards from work on electric-utilization installations, which Subpart S covers; and oil and gas well drilling and servicing.

Your employer must train you so that the purpose and function of its energy control program are understood.