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Superannuation of registered officers and servants. 
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66.—(1) This section applies to every officer or servant of a mental hospital authority— 
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(a) whose name is registered in the register maintained under this Part of this Act by the authority, and 
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(b) who has been in the service of a mental hospital authority for not less than twenty years, and 
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(c) who is not less than fifty-five years of age. 
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(2) Subject to the provisions of this Part of this Act, an officer or servant of a mental hospital authority, who, while this section applies to him, resigns or otherwise ceases to hold office or employment shall be entitled to receive from the authority— 
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(a) an allowance during life the annual amount of which shall consist of— 
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(i) twenty-eightieths of his yearly salary or wages, and 
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(ii) where he has been in the service of a mental hospital authority for twenty-one or more completed years, two-eightieths of his yearly salary or wages in respect of each of the twenty-first and the subsequent (if any) of such completed years, and 
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(b) a lump sum consisting of— 
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(i) twenty-thirtieths of his yearly salary or wages, and 
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(ii) where he has been in the service of a mental hospital authority for twenty-one or more completed years, two-thirtieths of his yearly salary or wages in respect of each of the twenty-first and the subsequent (if any) of such completed years. 
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