(a) A building or improvement mentioned in AS 34.35.050 constructed with the knowledge of the owner of the land or the person having or claiming an interest in the land is considered to be constructed at the instance of the owner or person having or claiming the interest.
(b) The interest owned or claimed is subject to a lien recorded under AS 34.35.050 - 34.35.120, unless
(1) the owner or person having or claiming an interest in the land gives notice within three days after the owner or other person obtains knowledge of the construction, alteration, or repair that the owner or other person will not be responsible for it, by posting a notice to that effect in writing in some conspicuous place upon the land or upon the building or other improvement located on the land;
(2) the notice is signed by the owner or person having or claiming an interest in the land in the presence of two attesting witnesses or acknowledged by the owner or other person before a notary public;
(3) the posting of notice is attested to by a witness; and
(4) an attested or notarized copy of the notice is recorded with the recorder of the recording district in which the land, building, or other improvement is located within three days after the posting of the notice.