All leasehold estates hereafter established and held on a term of ninety-nine years or more or for a term certain renewable at the option of the lessee for an additional term of ninety-nine years or more shall be valued at the full value of the land and taxed to the lessee until the end of the term. Provided, however, that the lease or contract must be recorded with the clerk of court or register of mesne conveyance of the county where the property is located. The lease must contain the name and resident address of the lessee, the length of the lease and the real consideration therefor, and the derivation of title to the lessor and his resident address. Provided, further, if such property should be sold for taxes, only the leasehold interest can be sold and not the fee.