Section 235.23 - Disseminating indecent material to minors; presumption and defenses1. A person who engages in the conduct proscribed by section 235.21 is presumed to do so with knowledge of the character and content of the material sold or loaned, or the motion picture, show or presentation exhibited or to be exhibited.2. In any prosecution for disseminating indecent material to minors in the second degree pursuant to subdivision one or two of section 235.21 of this article, it is an affirmative defense that: (a) The defendant had reasonable cause to believe that the minor involved was seventeen years old or more; and(b) Such minor exhibited to the defendant a draft card, driver's license, birth certificate or other official or apparently official document purporting to establish that such minor was seventeen years old or more.3. In any prosecution for disseminating indecent material to minors in the second degree pursuant to subdivision three of section 235.21 of this article or disseminating indecent material to minors in the first degree pursuant to section 235.22 of this article, it shall be a defense that: (a) The defendant made a reasonable effort to ascertain the true age of the minor and was unable to do so as a result of actions taken by the minor; or(b) The defendant has taken, in good faith, reasonable, effective and appropriate actions under the circumstances to restrict or prevent access by minors to materials specified in such subdivision, which may involve any appropriate measures to restrict minors from access to such communications, including any method which is feasible under available technology; or(c) The defendant has restricted access to such materials by requiring use of a verified credit card, debit account, adult access code or adult personal identification number; or(d) The defendant has in good faith established a mechanism such that the labelling, segregation or other mechanism enables such material to be automatically blocked or screened by software or other capabilities reasonably available to responsible adults wishing to effect such blocking or screening and the defendant has not otherwise solicited minors not subject to such screening or blocking capabilities to access that material or to circumvent any such screening or blocking.