All participants subject to a CRP contract must agree to:

Carry out the terms and conditions of such CRP contract;

Implement the conservation plan, which is part of such contract, in accordance with the schedule of dates included in such conservation plan unless the Deputy Administrator determines that the participant cannot fully implement the conservation plan for reasons beyond the participant's control, and CCC agrees to a modified plan. However, a contract will not be terminated for failure to establish an approved vegetative or water cover on the land if, as determined by the Deputy Administrator:

The failure to plant or establish such cover was due to excessive rainfall, flooding, or drought;

The land subject to the contract on which the participant could practicably plant or establish to such cover is planted or established to such cover; and

The land on which the participant was unable to plant or establish such cover is planted or established to such cover after the wet or drought conditions that prevented the planting or establishment subside;

Establish temporary vegetative cover either when required by the conservation plan or, as determined by the Deputy Administrator, if the permanent vegetative cover cannot be timely established;

Comply with part 12 of this title;

Not allow grazing, harvesting, or other commercial use of any crop from the cropland subject to such contract except for those periods of time approved in accordance with instructions issued by the Deputy Administrator;

Establish and maintain the required vegetative or water cover and the required practices on the land subject to such contract and take other actions that may be required by CCC to achieve the desired environmental benefits and to maintain the productive capability of the soil throughout the contract period;

Comply with noxious weed laws of the applicable State or local jurisdiction on such land;

Control on land subject to such contract all weeds, insects, pests and other undesirable species to the extent necessary to ensure that the establishment and maintenance of the approved cover as necessary or may be specified in the CRP conservation plan and to avoid an adverse impact on surrounding land, taking into consideration water quality, wildlife, and other needs, as determined by the Deputy Administrator; and

Be jointly and severally responsible, if the participant has a share of the payment greater than zero, with the other contract participants in compliance with the provisions of such contract and the provisions of this part and for any refunds or payment adjustments that may be required for violations of any of the terms and conditions of the CRP contract and this part.