Durability according to ISO 12944-5

The standard determines durability ranges, which affects the time to the first major maintenance round: H, M and L.
These ranges are as follows:
H - High Durability (maintenance period more, than 15 years)
M - Medium Durability (maintenance period from 5 to 15 years)
L - Low Durability (maintenance period less, than 5 years).