SEC. 151.06. AUTOMATIC ADJUSTMENTS. (Title Amended by Ord. No. 153,552, Eff. 5/1/80; Section Amended by Ord. No. 154,237, Eff. 8/30/80, Oper. 9/1/80.) The maximum rent or maximum adjusted rent for a rental unit may be increased without permission of the Rent Adjustment Commission or the Department, as follows: A. For a rental unit which has not had a rent increase since May 31, 1976 (other than one imposed pursuant to Section 3B(5) or (6) of Ordinance No. 151,415, as amended and/or Section 151.07 of this chapter: Prior to any increase pursuant to Subsection D. of the section, a landlord may increase the maximum rent by an amount not to exceed 19%, but if the landlord pays all the costs of electricity and/or gas services for a rental unit, then the maximum or maximum adjusted rent may be increased an additional 1% for each such service paid by the landlord. Thereafter, the rent may be adjusted automatically only in accordance with Subsections C. and D. B. For a rental unit which has not had a rent increase since May 31, 1977 (other than one imposed pursuant to Section 3B(5) or (6) of Ordinance No. 151,415, as amended, and/or Section 151.07 of this chapter) but which did have a rent increase within one year prior to that date: Prior to an increase pursuant to Subsection D. of this section, a landlord may increase the maximum rent by an amount not to exceed 13%, but if the landlord pays all the costs of electricity and/or gas services for a rental unit, then the maximum or maximum adjusted rent may be increased an additional 1% for each such service paid by the landlord. Thereafter, the rent may be adjusted automatically only in accordance with Subsections C. and D. below. C. (Amended by Ord. No. 181,744, Eff. 7/15/11.) Where all of the tenants have vacated a rental unit subject to the provisions of this Article, the following provisions apply: 1. The landlord may increase the maximum rent or maximum adjusted rent to any amount upon re-rental of the unit in any of the following circumstances: (a) the rental unit was vacated voluntarily. (b) the rental unit was vacated as a result of the landlord’s termination of tenancy pursuant to Subdivisions 1., 2., 9. or 13. of Subsection A. of Section 151.09 of this Code. (c) the rental unit was vacated as a result of the landlord’s termination of tenancy pursuant to Subdivisions 3. or 4. of Subsection A.