for new transmission property An electric power transmission line is described in this subparagraph if— (i) such transmission line— (I) includes an advanced transmission conductor, and (II) is capable of transmitting electricity at a voltage of not less than 100 kilovolts, or (ii) such transmission line— (I) is a superconducting transmission line or is capable of transmitting electricity at a voltage of at least 345 kilovolts, and (II) has a transmission capacity of not less than 750 megawatts or is a transmission line described in subparagraph (D). (D) Multiple transmission lines located in the same right-of-way A transmission line is described in this subparagraph if such a transmission line— (i) is co-located in the same right-of-way or adjacent right-of-way as one or more other overhead, submarine, or underground transmission lines, and (ii) together with the other transmission lines described in subparagraph (A), has a transmission capacity of not less than 1,000 megawatts. (3) Modified existing transmission property The term modified existing transmission property means any electric power transmission line which— (A) was placed in service before the date of the enactment of this section, (B) is modified after the date of enactment of this Act in a manner that— (i) increases the transmission capacity of such transmission line by not less than 500 megawatts, or (ii) includes an advanced transmission conductor that transmits electricity at a voltage of not less than 100 kilovolts, and (C) after the completion of such modification, is an electric power transmission line which satisfies the requirements under subclauses (ii) and (iii) of paragraph (2)(A). (4) Advanced transmission conductor The term advanced transmission conductor means a transmission conductor technology that uses recently developed technology or materials such as a composite core and such other future advances as determined by the Secretary, in consultation with the Secretary of Energy. (5) Superconducting transmission line The term