Mike Griffith wrote:

Mike,

You know this is a false claim. It's an easy matter to look up the
actual law and see what it said. One convenient source is the O.R.,
Series IV, Vol. 3, p. 1161. One could also look at the Journals of the
CS Congress. Both are on-line.

The actual law states:

SEC. 5. That nothing in this act shall be construed to authorize a
change in the relation which the said slaves shall bear toward their
owners, except by consent of the owners and of the States in which they
may reside, and in pursuance of the laws thereof.

So no requirement that anyone be freed.

The order implementing the law states:

No slave will be accepted as a recruit unless with his own consent and
with the approbation of his master by a written instrument conferring,
as far as he may, the rights of a freedman, and which will be filed with
the superintendent.

This strongly suggests that the slave concerned be freed, but doesn't
mandate it, and says nothing about freeing any family members.