Each approved diesel engine shall be identified by a legible and permanent approval marking inscribed with the assigned MSHA approval number and securely attached to the diesel engine. The marking shall also contain the following information:

1. (a) Ventilation rate.
2. (b) Rated power.
3. (c) Rated speed.
4. (d) High idle.
5. (e) Maximum altitude before deration.
6. (f) Engine model number.