Struggling to Find All Payment of Gratuity Amendment Acts? Let's Figure It Out Together

Dear Sir, we want to download all the Payment of Gratuity (Amendment) Acts. What are the amendment acts made till now? We have tried to download from Home, but we have failed.

Mainly we want to get the following Amendment Acts:

(i) The Payment of Gratuity (Amendment) Act 1984, (25 of 1984)
(ii) The Payment of Gratuity (Second Amendment) Act 1984, (26 of 1984)
(iii) The Payment of Gratuity (Amendment) Act 1987, (22 of 1987)
(iv) The Payment of Gratuity (Amendment) Act 1994, (34 of 1994)
(v) The Payment of Gratuity (Amendment) Act 1998, (11 of 1998)
(vi) The Payment of Gratuity (Amendment) Act 2009, (47 of 2009)
(vii) The Payment of Gratuity (Amendment) Act 2010, (15 of 2010)
(viii) And, if any other amendment acts are available related to The Payment of Gratuity Act, 1972.

Questions:

(a) Where can we download all the amendment acts related to The Payment of Gratuity Act, 1972, and The Payment of Gratuity (Central) Rules, 1972-1?
(b) If all the Payment of Gratuity (Amendment) Acts are available, please provide the same.
(c) How can we confirm the above-mentioned (Amendment) Acts are the only ones made till now and no other (Amendment) Acts are available?

Please clarify.

Thanks and regards,
T. Thirumurugan.