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(a) In cases not otherwise provided for by law, depositions may be taken and read in either house or before a committee thereof, or before both houses in joint meeting, in all cases in which the taking and reading of depositions would be allowed in any cause pending before a court of law.
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(b) When necessary, the presiding officer of the house in which they may be required or of a joint meeting may issue commissions to take such depositions.
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(c) The proceedings in taking and returning depositions shall be the same as may be prescribed by law for taking depositions to be read in a court of law.