(1) In this Chapter the following definitions shall apply:

(a) Properties shall be deemed vacant where no legal occupants have occupied the building for a continuous period of six or more months prior to the offer of such property to the City.

(b) Properties shall be deemed delinquent where the owner of the property is delinquent in the payment of Real Estate Taxes or Water and Sewer Rent and/or against which there are municipal liens.

(c) Blighted properties shall include:

(.1) Any premises which because of its physical condition or use is regarded at law as a public nuisance or has been declared "unfit for use" by a City agency or Department in accordance with the provisions of any City Code.

(.2) Any vacant or unimproved lot or parcel of ground in a predominantly built-up neighborhood, which as a result of neglect or lack of maintenance by the owner has become a place for the accumulation of trash and debris or a haven for rodents or other vermin; or has thereon abandoned wells, shafts, basements, excavations, unsafe fence or other unsafe structures so designated by any City agency under the provisions of any City Code or which condition shall be deemed legally to be a public nuisance by the City.

(.3) Those properties defined as blighted by Act No. 94 of June 23, 1978, amending the act of May 24, 1945 (P.L. 991, No. 385) known as the "Urban Redevelopment Law," and any future amendments thereto.[22]

(d) Surplus Properties.[23] Surplus properties are those properties which:

(.1) are vacant;

(.2) have been acquired by the City at Sheriff's sales within the City's equity of unpaid taxes and other municipal claims;

(.3) the City has no bonded indebtedness in;

(.4) are determined to be suitable to effectuate the purposes of this Chapter; and

(.5) have not been designated by the Commissioner of Public Property as necessary for other municipal uses.