(a) As used in this article:

(i) 'Business day' means any day other than Saturday, Sunday or legal holiday as established by the annexing municipality;

(ii) 'Landowner' means the owner of real property in the territory proposed to be annexed who in the last calendar year was liable for a property tax thereon or was exempt by law from the payment of taxes on the property. Anyone having a right to purchase land under a written contract is the owner of that land for annexation purposes. For purposes of W.S. 15-1-402, 15-1-404 and 15-1-405 'landowner' shall include persons owning property which, as a result of the proposed annexation would then be brought within one-half (1/2) mile of the corporate limits of a city which has exercised the authority granted under W.S. 15-3-202(b)(ii);

(iii) 'Petition' means a legibly written document.