(a) Most crop history and allotments on eligible lands were discontinued at the time of mining. However, if eligible lands are classified as cropland at the time the contract is signed, the cropland crop history and allotment, if any, may be:

(1) Preserved for a period not to exceed twice the length of the contract as provided in 7 CFR part 719, or

(2) Voluntarily surrendered by the land user.