The use of walkie-talkies has been prohibited in tourist jeeps, tourist camps and tourist bungalows throughout Kumana National Park from October 1.
The Park Warden said the new restriction applies across the national park.
Tourists, safari operators and other relevant parties have been informed not to use walkie-talkies inside the park.
Park authorities said the decision was taken because of concerns about harm caused to wildlife and the environment by the use of walkie-talkies.
That explanation should remain attributed to park authorities.
The available announcement does not establish through independently published scientific evidence the extent or mechanism of any wildlife impact.
The information available at publication time also does not specify the penalty for violating the restriction.
It does not establish whether the prohibition applies to other types of radio communication equipment or whether similar restrictions will be introduced at other Sri Lankan national parks.
Those issues should not be inferred beyond the park announcement.
The confirmed operational change is that walkie-talkies are prohibited in tourist jeeps, camps and bungalows within Kumana National Park from October 1.