Strategy based inspection for bridges

Hi Guys,

I have a scenario to map for Bridges inspection on my current project

The scenario is...

We have a bridge 'A' that undergoes two levels of inspection Level 1 and Level 2. The frequency for 'L1' is Annual and for L2 every 5 years. L1 is a visual inspection and L2 is a detailed inspection. Whenever we have L2 inspections there should be no L1 inspection scheduled.

I have mapped the scenarios as follows

1) Created and equipment for the Bridge

2) Created a equipment tasklist - with two group counters - counter '1' for Level 1 counter '2' for Level 2.

However i can't understand how to avoid Level 1 inpsections when there is a  'L2' inspection. This sounds to me like a strategy based inspection but not quite sure how to map it?

Thanks,
Sravan