Which of the following is not eligible for the Children's Drug Plan coverage?

The correct choice regarding eligibility for the Children's Drug Plan coverage is that children covered under federal programs are not eligible. This is because the Children's Drug Plan is specifically designed to provide coverage for children who do not have access to other funding avenues for their prescription medications. Children under the federal programs, like those who are part of First Nations or other federally funded healthcare systems, are already receiving assistance with their medication costs, thus they fall outside the eligibility criteria for this provincial program.

The other options, including children under 14, children not eligible for other coverage, and all children in Saskatchewan, fit within the parameters of the Children's Drug Plan. Children under 14 years of age, as a primary demographic for this coverage, are inherently included, while those not eligible for other forms of coverage are specifically targeted for assistance. The mention of all children in Saskatchewan does not apply either, as the plan does not extend to those with existing federal coverage.