CRA pays both, on the family's net income from the year before last (the same base year as the Canada Child Benefit).
Nova Scotia Child Benefit
$1,525 a year for each child under 18, paid monthly with the CCB. A family under $26,000 gets all of it. From there to $34,000, a family with one child still gets the full amount, and one with more gets one child's amount in full and 50% of the rest. From $34,000, nothing is paid.[1]
Affordable Living Tax Credit
$255 a year for a person or couple and $60 for each child, less 5% of family income over $30,000, paid a quarter at a time in January, April, July and October.[2]
What it does not do
The child benefit for a child in shared custody is not modelled: the rules give no split, so the plan stops with a reason. See income tax in Nova Scotia.