The answer depends on whom is setting the recommendations, which are always based on age. The Institute of Medicine sets the Adequate Intake for sodium at 1000 mg a day for children ages 2 to 3, 1200 mg  for 4 to 8 and 1500 mg per day for boys and girls ages 9 to 18.  The Dietary Guidelines for Americans sets the upper limit at less than 1500 for children 1 to 3, 1900 mg for ages 4 to 8, 2200 mg for ages 9 to 13, and 2300 mg per day for ages 14 - 18 year.  Dietary surveys show that children consume more sodium than the amount recommended.  Sodium intake is related to overall calorie intake.  For example, calorie intake is higher among males than females, and intake of sodium is also higher among males than females.