In this title the following words have the meanings indicated. “Commissioner” means the Commissioner of Labor and Industry. “Employer” means a contractor or subcontractor that has a State contract for services valued at $100,000 or more. “Employer” does not include a contractor or subcontractor that: employs 10 or fewer employees; and has a State contract for services valued at less than $500,000. “Living wage” means an hourly wage set as provided under § 18–103 of this title. “Tier 1 area” includes Montgomery County, Prince George’s County, Howard County, Anne Arundel County, Baltimore County, and Baltimore City. “Tier 2 area” includes any county in the State not included in the Tier 1 area.