He said the district doesn't want to break the law.
MORE: http://warnerrobins.13wmaz.com/news/schools/110332-hines-no-prayers-hymns-houston-graduations-year
See also...
After Turning Last Year's Graduation Into a Church Service, a Superintendent Finally Sees the Light
http://www.patheos.com/blogs/friendlyatheist/2013/05/02/after-turning-last-years-graduation-into-a-church-service-a-superintendent-finally-sees-the-light/