324.141.  License displayed prominently at location of practice. — A person licensed pursuant to the provisions of sections 324.125 to 324.183 shall display the license certificate issued pursuant to sections 324.125 to 324.183 in a prominent place at the site, location or office from which such person practices such person's profession or such license holder shall maintain on file at all times during which the license holder provides services in a health care facility a true and correct copy of the license certificate in the appropriate records of the facility.  A license holder shall inform the board of any change of address for the license holder.  A license certificate issued by the board is the property of the board and shall be surrendered upon demand.