They have been charged with violations of federal regulations protecting park resources, according to Ms. Fisher.
"There's a difference between wanting to protect your house and the park resources being in danger.
"If you ask me, 'Are the park resources threatened by waves?' the answer is no," he said.
But rangers in 40 parks reported significant illegal use of the vehicles, and 38 parks reported serious damage to park resources as a result.
… Hovercraft shall only be permitted pursuant to special regulations and only following a thorough analysis of their effect on park resources".
The story is based on the view that, during the nine months of Seleka control, Chamek, as a Muslim, played an important moderating role in Bayanga, protecting residents and park resources.
The Yellowstone agreement with the Diversa Corporation was announced in 1997 as the prototype for a policy by the National Park Service to be paid for drugs or chemicals derived from the national park resources.
Sean Smith, a spokesman for the Bluewater Network, said the ban would "better protect the visiting public as well as park resources and wildlife from these noisy, smelly and dangerous machines".
"It reaffirms the Park Service's mandate to protect and preserve the parks and will insure that this summer, no more park resources, wildlife or visitors will be exposed to the dangerous operation, ear-shattering noise and stinking blue haze of these motorized thrill craft".
The lawsuit charged that the agreement violates federal policy, exploits park resources and threatens conservation.
