277 N.E.2d 493 ROCKLAND MUTUAL INSURANCE COMPANY vs. COMMISSIONER OF INSURANCE. Supreme Judicial Court of Massachusetts. Suffolk.December 21, 1971. December 28, 1971. Present: CUTTER, REARDON, BRAUCHER, HENNESSEY, JJ. Insurance, Certificate of authority to write insurance. Statute, Construction. Mandamus. In a confused statutory situation, a consistent, long continued, administrative practice of a public officer charged with […]