Reshaping automatic polygon edge based on reference layer using ArcGIS for Desktop?

Question

i have two polygon layer, one for Region administrative"Reference layer", and the second is administrative border is governorates.

Governorates border is not identical with Region border. So there is any idea to perform reshape automatic Governorates border with Region border

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Answer 1

INPUTS:

ASSUMPTION:

Region belongs to governorate, if majority of region's area belongs to that governorate.

SOLUTION:

Intersect regions and governorates. Remove all the fields, but governorate and region ids. Calculate area and sort table in descending order by area:

Select non-first records in above table using region id and delete these records.

Join intersect table to regions, using region id field:

And dissolve it using governorate id.

RESULT:

Note some minor editing might be possible for small regions if you don't like the governorate they will end up within