§ 52.61 Duration of renewal.
Each renewal of certification for a standard design will be for not less than 10, nor more than 40 years.
[72 FR 49529, Aug. 28, 2007; 90 FR 28873, Jul. 02, 2025]
Page Last Reviewed/Updated Friday, September 19, 2025
Page Last Reviewed/Updated Friday, September 19, 2025