(1) Before any purchaser, or assignee of such purchaser, of a tax lien on any land, town or city lot, or mining claim sold for taxes or special assessments due either to the state or any county or incorporated town or city within the same at any sale of tax liens for delinquent taxes levied or assessments authorized by law is entitled to a deed for the land, lot, or claim so purchased, he shall make request upon the treasurer, who shall then comply with the following:

(a) The treasurer shall serve or cause to be served, by personal service or by either registered or certified mail, a notice of such purchase on every person in actual possession or occupancy of such land, lot, or claim, and also on the person in whose name the same was taxed or specially assessed if, upon diligent inquiry, such person can be found in the county or if his residence outside the county is known, and upon all persons having an interest or title of record in or to the same if, upon diligent inquiry, the residence of such persons can be determined, not more than five months nor less than three months before the time of issuance of such deed. In such notice the treasurer shall state when the applicant or his assignor purchased the tax lien on such land, lot, or claim, in whose name such property was taxed, the description of the land, lot, or claim for which a tax lien was purchased, for what year taxed or specially assessed, and when the time of redemption will expire or when the tax deed shall be issued.

(b) In all cases or instances where the valuation for assessment of the property is five hundred dollars or more, the treasurer shall publish such notice, three times, at intervals of one week, in some daily, weekly, or semiweekly newspaper published in such county, not more than five months nor less than three months before the time at which the tax deed may issue, and he shall send by registered or certified mail a copy of such notice to each person not found to be served whose address is known or can be determined upon diligent inquiry. If no such newspaper is published in the county, then said notice shall be published in the newspaper that is published in Colorado nearest the county seat of the county in which such land, lot, or claim is situated. The purchaser or assignee, at the time of making such request for notification on the treasurer, shall pay to the treasurer a fee, as provided in section 30-1-102, C.R.S. The treasurer shall make and carefully preserve among the files of his office a record of all things done in compliance with this section and shall certify to the same.

(2) When request is made for a tax deed to lands situated wholly within the exterior boundary lines of an irrigation district, the holder of tax sale certificates of purchase to such lands may include in one request or demand for a tax deed all contiguous tracts for which he holds such certificates of purchase. When all of such lands for which a tax deed is so requested or demanded are unoccupied and no taxes have been paid thereon, or upon any parcel of such lands embraced in such request or demand, for five consecutive years prior to the making of such request or demand, the only notice which the treasurer shall be required to give of the fact that a request or demand for tax deed has been made upon him shall be a notice of publication as provided in this section, in which as many tracts or parcels of land shall be described as are embraced in any one demand or request for deed.