glTexImage2DMultisample gives error with SNORM internal formats

glTexImage2DMultisample gives GL_INVALID_ENUM error when called with snorm internal formats. when i checked http://www.opengl.org/sdk/docs/man3/xhtml/glTexImage2DMultisample.xml , and it does not specifies any operation with error GL_INVALID_ENUM. Is snorm formats are supported for that API or not?