In support of my last post above, one needs to take note of followings provisions from CGST Act, 2017:
"Apportionment of credit and blocked credits.
17. ..............
(5) Notwithstanding anything contained in sub-section (1) of section 16 and subsection (1) of section 18, input tax credit shall not be available in respect of the following, namely:-
...............
(c) works contract services when supplied for construction of an immovable property (other than plant and machinery) except where it is an input service for further supply of works contract service;
(d) goods or services or both received by a taxable person for construction of an immovable property (other than plant or machinery) on his own account including when such goods or services or both are used in the course or furtherance of business.
Explanation.––For the purposes of clauses (c) and (d), the expression “construction” includes re-construction, renovation, additions or alterations or repairs, to the extent of capitalisation, to the said immovable property;
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Explanation.–– For the purposes of this Chapter and Chapter VI, the expression “plant and machinery” means apparatus, equipment, and machinery fixed to earth by foundation or structural support that are used for making outward supply of goods or services or both and includes such foundation and structural supportsbut excludes-
(i) land, building or any other civil structures;
(ii) telecommunication towers; and
(iii) pipelines laid outside the factory premises."
And Section 2(119) which reads as follows:
"(119) “works contract” means a contract for building, construction, fabrication, completion, erection, installation, fitting out, improvement, modification, repair, maintenance, renovation, alteration or commissioning of any immovable property wherein transfer of property in goods (whether as goods or in some other form) is involved in the execution of such contract;"
Following points are worth noting IMHO:
A. Restriction on ITC u/s sub-clause (c) & (d) of Section 17(5) is for 'Construction of immovable property' OTHER THAN "Plant & Machinery''.
B. “Works contract” u/s 2(119) covers not only 'Construction of immovable property' but also activities like "erection, installation of immovable property".
B1. Thus, scope of works contract u/s 2(119) is much more vast as compared to what is restricted for ITC u/s sub-clause (c) & (d) of Section 17(5).
C. Case-laws related to excise regime (i.e. Excisebility or otherwise of any particular item / plant / system on the ground that same is movable or immovable etc.) has no direct relevance to block ITC u/s sub-clause (c) & (d) of Section 17(5) in following situations:
I. When there is NO 'Construction of immovable property'
II. Even when there is 'Construction of immovable property', but same is for 'Construction' of 'Plant & Machinery' (What is 'Plant & Machinery', is duly explained under Section 17(5)).
III. When, as an inward supply, it is works contract (as defined u/s 2(119)) for activities other than 'Construction of immovable property'.
These are ex facie views of mine and the same should not be construed as professional advice / suggestion.