The Representatives shall be elected from districts. The General Assembly, at the first regular session convening after the return of every decennial census of population taken by order of Congress, shall revise the representative districts and the apportionment of Representatives among those districts, subject to the following requirements:

  (1) Each Representative shall represent, as nearly as may be, an equal number of inhabitants, the number of inhabitants that each Representative represents being determined for this purpose by dividing the population of the district that he represents by the number of Representatives apportioned to that district;

  (2) Each representative district shall at all times consist of contiguous territory;

  (3) No county shall be divided in the formation of a representative district;

  (4) When established, the representative districts and the apportionment of Representatives shall remain unaltered until the return of another decennial census of population taken by order of Congress.