The permittee shall comply with the terms and conditions of the permit, and shall maintain a responsible person in charge of the fire at all times who shall maintain the fire under control, not permit it to spread to other property or structures, and extinguish the fire when the authorized burning is completed or when directed by district personnel. The possession of a permit shall not relieve the permittee from liability for damages resulting from the fire for which the permittee may otherwise be liable.