A police officer who arrests a person under this Act or pursuant to a warrant issued under this Act, or is present at such an arrest, may, if the police officer suspects on reasonable grounds that it is prudent to do so in order to ascertain whether the person is carrying any seizable items:
(a) conduct a frisk search of the person at or soon after the time of arrest; and
(b) seize any seizable items found as a result of the search.