Yes samples are required and tests by an accredited civil engineering materials testing facility?
The tests required are:
Indicators = Grading and Atterberg limits (TMH1 Method A1, A2, A3 and A5)
CBR = California Bearing Ratio (TMH1 Method A8)
UCS = Unconfined Compression Strength (TMH1 Method A14)
ITS = Indirect Tensile Strength (TMH1 Method A16T)
W/D brushing = Wet-dry brushing test (TMH1 Method A19)
Or the ASTM equivalents.