| 11. | "That's a hard and fast rule ."
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| 12. | There are no hard and fast rules for choosing a ceiling pattern.
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| 13. | But there are no hard and fast rules on what is appropriate.
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| 14. | Even better, there are no restrictions or hard and fast rules.
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| 15. | These needn't be hard and fast rules, of course.
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| 16. | "There's no hard and fast rule you can draw.
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| 17. | He doesn't go for hard-and-fast rules.
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| 18. | After a two-day trial, he promises a fast ruling.
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| 19. | "There's no hard and fast rules.
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| 20. | Note that these temperatures are not hard and fast rules.
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