In 2001, and in the year following each decennial census thereafter, the board of trustees of community college District #522 shall reapportion the trustee districts to reflect the results of the census, and shall divide the community college district into 7 trustee districts, each of which shall be compact, contiguous, and substantially equal in population to each other district. The division of the community college district into trustee districts shall be completed and formally approved by a majority of the members of the board of trustees of community college District #522 in 2001 and in the year following each decennial census. At the same meeting of the board of trustees, the board shall, publicly by lot, divide the trustee districts as equally as possible into 2 groups. Beginning in 2003 and every 10 years thereafter, trustees or their successors from one group shall be elected for successive terms of 4 years and 6 years; and members or their successors from the second group shall be elected for successive terms of 6 years and 4 years. One member shall be elected from each such trustee district.