English to Spanish Other Manufacturing supply systems

Schedule Time Fence (STF) is defined as the period in which no fluctuations are made in the requested quantities. This value corresponds to transportation Lead Time, Shipping Lead Time (shipment preparation) and the Lag rime (gap) óf emission between two consecutive schedules.

2: Obsoletes covering to Suppliers:

The following two types of covering are established:

Authorised production days as of calculation date.

Authorised days for raw materials and specific components supply as of calculation date.

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This is from a (rather strangely woreded) car component manufacturers supply schedule.
I don't usually take on Eng>Sp, this is a favour.
Thanks to all those who answered other queries - I'll close those kudoz questions tomorrow.
Thanks - JeffG