30 CFR § 56.16016
Lift trucks
July 29, 2020
Fork and other similar types of lift trucks shall be operated with the—
(a) Upright tilted back to steady and secure the load;
(b) Load in the upgrade position when ascending or descending grades in excess of 10 percent;
(c) Load not raised or lowered enroute except for minor adjustments; and
(d) Load-engaging device downgrade when traveling unloaded on all grades.