Could our occupancy limit be considered discrimination?

[Andy Bondhus]

Texas code Sec. 92.010 says:  the maximum number of adults that a landlord may allow to occupy a dwelling is three times the number of bedrooms in the dwelling.  So that would be 9 adults for a 3 bedroom unit.  If I were to only allow 2 occupants per bedroom, that isn't violating any Fair Housing Laws, is it?  

Also, what if I wanted to say of the 6 occupants, only 2 could be adults, so let's say 2 parents and 4 kids?  Would that get me in trouble for discrimination?