(a) All agencies or organizations, engaged in the placement of dependent children within this State, may remove any child so placed when, in the judgment of such agency, the welfare and best interests of the child require such action, whether such right was received or not at the time the child was placed.
(b) Whenever any person with whom a dependent child has been placed refuses to give up such child on the demand of the representative of such agency, the agency, through its duly recognized representative, may give written notice to such person to deliver the child to the nearest railroad station or some other equally convenient place at a day and hour to be fixed in the notice, not less than 1 nor more than 3 days after the date of the notice.
Whoever wilfully refuses or neglects to comply with the requirements of the notice shall be fined in such amount or imprisoned for such term, or both, as the court in its discretion may determine.