NR 440.642(4)(e)1.1. The administrator shall issue a certificate of compliance for a model line if he or she determines, based on all information submitted by the applicant and any other relevant information available, that all of the following requirements have been met: NR 440.642(4)(e)1.a.a. A valid certification test has demonstrated that the wood heater representative of the model line complies with the applicable particulate emission limits in sub. (3), NR 440.642(4)(e)1.b.b. Any tolerances or materials for components listed in par. (k) 2. or 3. that are different from those specified in those paragraphs may not reasonably be anticipated to cause wood heaters in the model line to exceed the applicable emission limits. NR 440.642(4)(e)2.2. Upon denying certification under this paragraph, the administrator shall give written notice to the manufacturer setting forth the basis for the determination. NR 440.642(4)(f)2.2. Conducted by a testing laboratory accredited by the administrator pursuant to sub. (6), NR 440.642(4)(f)3.3. Conducted on a wood heater similar in all material respects to other wood heaters of the model line that is to be certified, and NR 440.642(4)(g)(g) To have a wood heater model certified under sub. (4) (e) to meet the emission limits in sub. (3) (b), a manufacturer shall enter into a contract with the accredited laboratory that performed the certification test, under which the laboratory will: NR 440.642(4)(g)1.1. Conduct the random compliance audit test at no cost to the manufacturer if the U.S. environmental protection agency selects that laboratory to conduct the test, or NR 440.642(4)(g)2.2. Pay the manufacturer the reasonable cost of a random compliance audit test (as determined by the U.S. environmental protection agency) if the U.S. environmental protection agency selects any other laboratory to conduct the test. NR 440.642(4)(i)(i) An applicant for certification may apply for a waiver of the requirement to submit the results of a certification test pursuant to par. (b) 4., if the wood heaters of the model line are similar in all material respects to another model line that has already been issued a certificate of compliance. A manufacturer that seeks a waiver of certification testing shall identify the model line that has been certified, and shall submit a copy of an agreement with the owner of the design permitting the applicant to produce wood heaters of that design. NR 440.642(4)(j)1.1. Unless revoked sooner by the administrator, a certificate of compliance shall be valid for 5 years from the date of issuance, for a model line certified as meeting emission limits in sub. (3) (b). NR 440.642(4)(j)2.2. Upon application for renewal of certification by the manufacturer, the administrator may waive the requirement for certification testing upon determining that the model line continues to meet the requirements for certification in par. (e), or that a waiver of certification is otherwise appropriate. NR 440.642(4)(j)3.3. Upon waiving certificate testing under subd. 2., the administrator shall give written notice to the manufacturer setting forth the basis for the determination. NR 440.642(4)(k)1.1. A model line shall be recertified whenever any change is made in the design submitted pursuant to par. (b) 3. that is presumed to affect the particulate emission rate for that model line. The administrator may waive this requirement upon written request by the manufacturer, if he or she determines that the change may not reasonably be anticipated to cause wood heaters in the model line to exceed the applicable emission limits. The granting of such a waiver does not relieve the manufacturer of any compliance obligations under this section. NR 440.642(4)(k)2.2. Any change in the indicated tolerances of any of the following components (where such components are applicable) is presumed to affect particulate emissions if that change exceeds ± 0.64 cm (± 1/4 inch) for any linear dimension and ± 5% for any cross-sectional area relating to air introduction systems and catalyst bypass gaps unless other dimensions and cross-sectional areas are previously approved by the administrator under par. (e) 1. b. NR 440.642(4)(k)2.b.b. Air introduction systems: Cross-sectional area of restrictive air inlets, outlets, and location, and method of control, NR 440.642(4)(k)2.f.f. Catalyst bypass mechanism and, for model lines certified to meet the emissions limits in sub. (3) (b) catalyst bypass gap tolerances (when bypass mechanism is in closed position): Dimensions, cross-sectional area, and location,