1. GTE+ Capacity Product Coordination (CPC) Workshop on 26 November 2008 Vladimir Outrata GTE Executive Committee Open Subscription Window recommendations

2. Characteristics of OSW Requests for services of different duration treated separately (in descending order) Prioritisation of long- term capacity It is not practicable to combine services with different durations in one booking Booked yearly capacity t max t min Daily capacity t max t min = latest booking (lead) time t max = earliest booking (lead) time 100 % 55 % 70 % 95 % 45 % available 30 % available Available capacity 0 % Booked monthly capacity Booked capacity

3. Booking process of OSW

4. OSW Allocation Method – Pro-rata available free capacity requested capacity capacity allocated through pro-rata methodology Base variable is volume of requested capacity Approach ensures equal approach to services for all market participants

5. OSW considerations Standardisation of capacity products –Non-overlapping booking windows, fixed start dates Easier coordination with adjacent TSOs Pro-rata allocation

6. Recommendations for OSW RecommendationDaily services*Monthly servicesYearly services Maximum lead time Less than Min. lead time for Yearly and Monthly services Min. 30 days*Min. 60 days* Window widthN.A.Max. 10 days*Max. 1 month Start dayN.A. First day of the calendar month First day of the calendar month, at least 1st of October * Calendar days before the start of transmission