; (II) operating under the supervision of a service technician described in subclause (I); (III) a licensed plumber or a plumber operating under the supervision of a licensed plumbing contractor; or (IV) an individual who holds a license or certification related to water treatment technologies issued by a State or local government; and (ii) regularly completes continuing education on water treatment technology and other subjects that enhance the services provided under this section; (C) that complies with all local and State regulations; and (D) that follows the maintenance instructions of the manufacturer. (3) Certified filter component The term certified filter component means a replaceable or replacement filter component— (A) for which approved maintenance can be performed; and (B) that is certified by a third-party certifier as compliant with— (i) NSF P231; (ii) NSF/ANSI Standard 42, 44, 53, 55, 58, or 401; or (iii) another successor or relevant consensus-based standard for drinking water treatment units or systems that addresses health contaminant reduction, as determined by the Secretary. (4) Eligible drinking water quality improvement product The term eligible drinking water quality improvement product means a point-of-use or point-of-entry system— (A) incorporating a certified filter component; and (B) that is certified by a third-party certifier to meet standards described in paragraph (3)(B)— (i) for material safety and performance; and (ii) to improve drinking water quality. (5) Eligible end user The term eligible end user means a person or entity located in a rural area (as defined in section 343(a)(13)(B)) that is— (A) (i) a homeowner; (ii) an individual lessee or renter of a home, apartment, or other dwelling; (iii) a property owner of a multi-unit residential building with 25 or fewer owned, leased, or rented dwelling units; (iv) a licensed child-care facility; or (v) an owned, leased, or rented facility