; and (2) for each unit of the National Forest System, a motor vehicle use map, in accordance with existing law. (b) Over-Snow vehicle-Use maps The Secretary concerned shall seek to have, not later than 10 years after the date of the enactment of this title, in a printed and publicly available format that is compliant with the format for geographic information systems, an over-snow vehicle-use map for each unit of Federal recreational lands and waters administered by the Chief of the Forest Service or Director of the Bureau of Land Management on which over-snow vehicle-use occurs, in accordance with existing law. (c) Out-of-Date maps Not later than 20 years after the date on which the Secretary concerned adopted or reviewed, through public notice and comment, a map described in subsection (a) or (b), the Secretary concerned shall seek to review, through public notice and comment, and update, as necessary, the applicable map. (d) Motorized and nonmotorized access The Secretaries shall seek to create additional opportunities, as appropriate, and in accordance with existing law, for motorized and nonmotorized access and opportunities on Federal recreational lands and waters administered by the Chief of the Forest Service or the Director of the Bureau of Land Management. (e) Savings clause Nothing in this section prohibits a lawful use, including authorized motorized or nonmotorized uses, on Federal recreational lands and waters administered by the Chief of the Forest Service or the Director of the Bureau of Land Management, if the Secretary concerned fails to meet a timeline established under this section. 128. Aquatic resource activities assistance (a) Definitions In this section: (1) Aquatic nuisance species task force The term Aquatic Nuisance Species Task Force means the Aquatic Nuisance Species Task Force established by section 1201(a) of the Nonindigenous Aquatic Nuisance Prevention and Control Act of 1990 ( 16 U.S.C. 4721(a) ). (2) Decontamination The term decontamination means actions to remove aquatic