Reading (mm Hg)	Category	Expiration date	Recertification
140 to 159/90 to 99	Stage 1	One year	One year if ≤ 140/90 mm Hg
			One-time certificate for three months if 140 to 159/90 to 99 mm Hg
160 to 179/100 to 109	Stage 2	One-time certificate for three months	One year from date of examination if ≤ 140/90 mm Hg
≥ 180/110	Stage 3	Disqualified	Six months from date of examination if ≤ 140/90 mm Hg, then every six months if ≤ 140/90 mm Hg