Which Lent should someone Baptized in an Eastern Roman Catholic rite follow? Issue

Lent is treated slightly differently across the Catholic Rites.  

In the Melkite Rite, the Great Lent begins on the Vespers of Clean Monday, which is the Monday after Ash Wednesday (Feb 19th this year), and ends on the Friday after the 5th Sunday of Lent.  This is precisely 40 days, counts Sundays and has stricter a stricter abstinence obligation than the Latin Rite form of Lent. Namely, that abstinence be practiced on all days of Lent except for Palm Sunday and the Feast of the Annunciation.

In the Roman Catholic Rite, lent begins on Ash Wednesday and ends on Holy Thursday.  This includes Sundays only as far as our conscience dictates.  

Question

If someone is baptized, given first communion, and confirmed as a Melkite Catholic, but has otherwise grown up in the Western Rite, does Melkite doctrine state that there can be a choice in which Lent a believer chooses to follow?
The Code of Canons of the Eastern Churches codifies common portions of the canon law of all the Eastern Catholic Churches within the (Roman) Catholic Church.

Canon 883 says


  The Christian faithful who are outside the territorial boundaries of their own Church sui juris can adopt fully for themselves the feast days and days of penance which are in force where they are staying.


This shows that someone whose own Church is an Eastern Rite Church,  but who lives in a Western country, is free to observe Lent according to the Latin rite instead of the rite of his own Church.

The question is about someone attending a Latin rite Church, rather than living in  Latin rite territory,  but in practice most Eastern Rite Catholics regularly attending a Latin Rite parish will do so because of where they live, and so I offer this answer.

In years when Easter is the same East and West, Clean Monday  is 2 days prior to Western Ash Wednesday and Eastern Lent ends 2 days before Palm Sunday. This year Eastern Easter is one eeek later. There are obvious disadvantages in fasting according to one calendar but  using the liturgy of another as one could be fasting in preparation for Easter even while celebrating it in church.

Source