; divided by (B) the number of families residing in the State that include a work-eligible individual. . (b) Participation requirements Section 407(c) ( 42 U.S.C. 607(c) ) is amended to read as follows: (c) Engaged in work For purposes of subsection (b): (1) General rule An individual is engaged in work for a month in a fiscal year if the recipient is participating in work activities for an average of at least 20 hours per week during the month. (2) Individuals complying with a modified employability plan deemed to be engaged in work An individual is deemed to be engaged in work for a month if the State determines that the individual is in substantial compliance with the activities and hourly participation requirements of a modified employability plan developed for the individual in accordance with section 408(h). (3) Single teen head of household or married teen who maintains satisfactory school attendance deemed to be engaged in work An individual who is married or a head of household and has not attained 20 years of age is deemed to be engaged in work for a month if the recipient maintains satisfactory attendance at secondary school or the equivalent during the month. . (c) Elimination of 12–Month limit on counting vocational educational training as a work activity Section 407(d)(8) ( 42 U.S.C. 607(d)(8) ) is amended by striking (not to exceed 12 months with respect to any individual) . 7. Work rules (a) Option of recipient To have trained personnel assess certain barriers to employment; additional matters required To be assessed Section 408(b)(1) ( 42 U.S.C. 608(b)(1) ) is amended— (1) by inserting (which, at the option of the recipient, shall be conducted by trained personnel with respect to barriers to employment specified by the recipient) after assessment