If it is impracticable for the board to determine from the records the length of service or the age of any member, or if the member refuses or fails to give the board a statement of his service or age, it may estimate his length of service or age for the purposes of this chapter.
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31520.1
31520.2
31520.3
31520.4
31520.5
31520.11
31520.12
31520.13
31521
31521.1
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31522
31522.1
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31522.3
31522.4
31522.5
31522.6
31522.7
31522.8
31522.9
31522.10
31523
31523.1
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31529.1
31529.5
31529.6
31529.9
31530
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31535.1
31536
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31542
31542.5
31543
31520.1
31520.2
31520.3
31520.4
31520.5
31520.11
31520.12
31520.13
31521
31521.1
31521.3
31522
31522.1
31522.2
31522.3
31522.4
31522.5
31522.6
31522.7
31522.8
31522.9
31522.10
31523
31523.1
31524
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31529.1
31529.5
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31529.9
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31535.1
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31542.5
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