(3) Not to make any alterations or additions or install any fixtures to the premise without prior consent in writing of the LESSOR. Any and all major alteration or additions made or fixtures installed by the LESSEE to the premise without consent of the LESSOR shall become the property of the LESSOR.And if the LESSEE does so without such consent, he / she must, if the LESSOR so desires, on the request of the LESSOR, restore the premise to the former condition at his/her own expense,