Whenever, after hearing and investigation, the department shall find any joint rate, fare, charge or price demanded and collected for any existing joint service participated in by 2 or more railroads to be unjust, unreasonable or discriminatory, it shall fix the same upon a just, reasonable and nondiscriminatory basis.
RSA 248:6
1913, 145:12. PL 243 :5. RL 293:5. 1951, 203:47 par. 6. RSA 379:6. 1985, 402:25.