Bengal Chief Minister Mamata Banerjee has written to Prime Minister Narendra Modi again, strongly underscoring her reservations about the proposed changes in the rules for IAS cadre, which have been further revised. Referring to her letter of last week, she said the Centre has meanwhile "accentuated its stand" and its revised draft is taking the matter to "non-federal extremes". "I find the revised amendment proposal more draconian than the former," she wrote in the two-page letter, contending that its "very grain is against the foundations of our great federal polity".