LST,
I believe (and I standby to be corrected) that the JAR-OPS reccomendation which AEU follow is that to be line checked following the addition of your first type rating (over 20T I think), you should complete a minimum of 40 sectors OR 100 Hrs which ever is first. At least that was the requirement for myself and the other students adding the B737 as there first Type Rating having completed the Bond type rating.
Hence the reasson Bond offer the 100 Hr LT package which allows the student to complete his/her final line check and be cleared to line. A benefit when applying to prospective airlines and of course being considered by AEU should they require FO's for ad hoc or short term contracts upon completion of your training.
Regards
LOB