what is the proper loading

for cartridge specs that read;
# Output voltage at 1000 Hz, 5cm/sec.: 300 µV
# Channel balance at 1 kHz: < 1 dB
# Channel separation at 1 kHz: > 20 dB
# Channel separation at 15 kHz: > 10 dB
# Frequency range: 20-25.000 Hz
# Frequency response: 20-20.000 Hz + 2 / - 1 dB
# FIM distortion at recommended tracking force, DIN 45.542: < 1%
# Tracking ability at 315Hz at recommended tracking force: > 70 µm
# Compliance, dynamic, lateral: 8 µm/mN
# Stylus type: Nude elliptical
# Stylus tip radius: r/R 8/18 µm
# Equivalent stylus tip mass: 0,45 mg
# Tracking force range: 3,0-5,0 g (30-50 mN)
# Tracking force, recommended: 4,0 g (40 mN)
# Tracking angle: 20°
# Internal impedance, DC resistance: 1.5 Ohm
# Recommended load impedance: > 10 Ohm
# Cartridge body material: Aluminium
# Cartridge color: Silver/Black
# Cartridge weight: 28,5 g