Availability/Intervals in a custom CZML object/property

Hello all,

I am using a custom CZML file to load in data stored in an array. I was wondering if it was possible to also use the availability/interval property like is available when using standard CZML. I have not had any luck with this. If I specify an interval property, along with other CZML properties, the interval property seems to do nothing.

Is there a standard way of going about this?

Thanks a lot!