From the article -
"We cannot help but question whether the Legislature actually intended the result we reach here today," Judge William Murphy wrote in November for a unanimous Court of Appeals panel, "but we are curtailed by the language of the statute from reaching any other conclusion."
"Technically," he added, "any time a person engages in sexual penetration in an adulterous relationship, he or she is guilty of
CSC I," the most serious sexual assault charge in Michigan's criminal code.
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From
michigan.gov/msp/0,1607,7-123-1589_1878_24961-158366--,00.html#15 #
# Who has to register as a sexual offender in Michigan?
Anyone who resides, works, or is a student in Michigan, permanently or temporarily, for 14 or more consecutive days or 30 days in a calendar year is required to register if any of the following apply:
Anyone convicted of a listed offense after October 1, 1995
What are the listed offenses?
Criminal Sexual Conduct 1st Degree (M.C.L. 750.520b)
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If CSC I means CSC 1, then yes, they do.