Let me explain this with diagrams. The job worker can be in LBT area or Outside LBT area. This gives us 2 situations.
In this case the job worker is situated outside LBT area and hence goods are sent outside city for processing. The goods cross border of city 2 times, so we need to study what are the implications at the each Entry and Exit. While sending good there is no levy of LBT as it is only on Entry of Goods into the city. When the goods are received after processing there is levy of LBT. If there were on provision of Rule 28 for this then the LBT had to be paid on whole of the value of goods imported. But since there is Rule 28, we need to pay LBT on only the value addition of the goods i.e. only on the amount of processing charges. Here for example the goods were sent for painting then only on the painting charges. However this exemption for paying LBT on the value addition is subject to below mentioned conditions which are required to be fulfilled.
In this case the job worker is situated outside LBT area and hence goods are sent outside city for processing. The goods cross border of city 2 times, so we need to study what are the implications at the each Entry and Exit. While sending good there is no levy of LBT as it is only on Entry of Goods into the city. When the goods are received after processing there is levy of LBT. If there were on provision of Rule 28 for this then the LBT had to be paid on whole of the value of goods imported. But since there is Rule 28, we need to pay LBT on only the value addition of the goods i.e. only on the amount of processing charges. Here for example the goods were sent for painting then only on the painting charges. However this exemption for paying LBT on the value addition is subject to below mentioned conditions which are required to be fulfilled.