For those who are struggling with the change in Treaty numbers post Lisbon, I have compiled a table of equivalences. It's in two parts: one for the Treaty on European Union (TEU) and one for the Treaty on the Functioning of the European Union (TFEU).

My apologies for the length of this and sincere thanks to Bonnie Calhoun of http://howcanidothat.blogspot.com

Treaty on European Union (TEU) as amended by the Treaty of Lisbon: from 1st December 2009	Treaty on European Union (TEU) or European Communities Treaty (EC) : from 1st May 1999 to 30 November 2009	Treaty of Rome: from 1st January 1958 to 30 April 1999
Article 3 TEU	Article 2 EC	Article 2
Article 4, para 3	Article 10 EC	Article 5
Article 6 TEU	Article 6 TEU	No equivalent
Article 19, para 1 TEU	Article 220 EC	Article 164
Article 19, paragraph 2, first subparagraph	Article 221, para 1 EC	Article 165
Article 19, paragraph 2, secondsubparagraph	Article 224 EC The first sentence of the first subparagraph	Article 168a

Treaty on the Functioning of the European Union (TFEU): from 1st December 2009	European Communities Treaty: from 1st May 1999 to 30 November 2009	Treaty of Rome: from 1st January 1958 to 30 April 1999
Articles 3-6 TFEU and Article 8 (para 2). Note also Protocol 27 on the internal market and competition	Article 3	Article 3
Article 14	Article 16	No equivalent
Article 18	Article 12	Article 6
Article 37	Article 31	Article 37
Article 93	Article 73	Article 77
Article 101	Article 81	Article 85
Article 102	Article 82	Article 86
Article 103	Article 83	Article 87
Article 104	Article 84	Article 88
Article 105	Article 85	Article 89
Article 106	Article 86	Article 90
Article 107	Article 87	Article 91
Article 108	Article 88	Article 92
Article 109	Article 89	Article 93
Article 119	Article 4	Article 3a
Article 251 now contains paras 2 and 3	Article 221, paras 2 and 3	Article 165
Article 254	Article 224 (except first sentence of first subparagraph)	Article 168a
Article 258	Article 226	Article 169
Article 259	Article 227	Article 170
Article 263	Article 230	Article 173
Article 265	Article 232	Article 175
Article 267	Article 234	Article 177
Article 268	Article 235	Article 178
Article 296	Article 253	Article 190
Article 340	Article 288	Article 215
Article 346	Article 296	Article 223
Article 352	Article 308	Article 235