Is a convicted sex offender required to register as a sex offender for life?

We are cognizant of the fact that had defendant been criminally prosecuted and convicted of his more egregious sexually deviant acts, he may have been required to register as a sex offender under section 290. Mandatory lifetime sex offender registration is required for a conviction for indecent exposure ( 314). ( 290, subd. (c); People v. Honan (2010) 186 Cal.App.4th 175.) Further, section 1170.18 provides: "The provisions of this section shall not apply to persons who have one or more prior convictions for an offense specified in clause (iv) of subparagraph (C) of paragraph (2) of subdivision (e) of Section 667 or for an offense requiring registration pursuant to subdivision (c) of Section 290." (Id., subd. (i), italics added.) However, defendant was not criminally convicted for his prior acts, and his most recent act occurred nearly 10 years ago.