(B)

1. (1) Except as provided in rules adopted under section 5107.05 of the Revised Code, a minor head of household or adult placed in one or more work activities or developmental activities shall participate in the activities at least the following number of hours each week as determined by the county department:

   1. (a) In the case of a minor head of household or adult in an assistance group that includes only one adult, thirty hours;
   2. (b) In the case of adults in an assistance group that includes two adults, thirty-five hours between the two adults.
2. (2) Of the hours specified in division (B)(1) of this section, a minor head of household or adult shall participate in one or more work activities at least twenty hours a week. After the minor head of household or adult has participated in a work activity established under section 5107.58 of the Revised Code for one thousand forty hours, the minor head of household or adult may not participate in that work activity for more than five hours a week. The minor head of household or adult may participate in one or more developmental activities for up to ten hours a week, including a developmental activity that is identical to a work activity established under section 5107.58 of the Revised Code.
3. (3) If a minor head of household or adult and county department agree, the minor head of household or adult may volunteer to participate in work activities and developmental activities for more than the number of weekly hours the county department determines under division (B)(1) of this section.