**Exhibit 31**

**Rule 13a-14(a) Certification**

 I, James Steffey,  certify that: 

| 1.     | I have reviewed  this 10-K of Tasa Products Limited;                                                                                                                                                                                                                                                                                             |
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| 2.     | Based on my  knowledge, this report does not contain any      untrue statement  of a material fact or omit to state a material      fact necessary to  make the statements made, in light of the      circumstances  under which the statements were made, not misleading      with respect to  the period covered by this report;               |
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| 3.     | Based on my  knowledge, the financial statements, and other      financial  information included in this report, fairly present in all      material respects  the financial condition, results of operations      and cash flows of  the registrant as of, and for, the periods      presented in this  report;                                 |
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| 4.     | The registrant's  other certifying officer and I are responsible      for establishing  and maintaining disclosure controls and      procedures (as  defined in Exchange Act Rules 13a-15(e) and 15d-      15(e)) and  internal control over financial reporting (as defined in      Exchange Act Rules  13a-15(f)) for the registrant and have: |

|   | a.     | Designed such  disclosure controls and procedures, or caused      such disclosure  controls and procedures to be designed under our      supervision, to  ensure that material information relating to the      registrant,  including its consolidated subsidiaries, is made known      to us by others  within those entities, particularly during the      period in which this  report is being prepared;         |
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|   | b.     | Designed such  internal control over financial reporting, or      caused such  internal control over financial reporting to be      designed under our  supervision, to provide reasonable assurance      regarding the  reliability of financial reporting and the      preparation of  financial statements for external purposes in      accordance with  generally accepted accounting principles;                |
|   |   |                                                                                                                                                                                                                                                                                                                                                                                                                  |
|   | c.     | Evaluated the  effectiveness of the registrant's disclosure      controls and procedures  and presented in this report our      conclusions about  the effectiveness of the disclosure controls and      procedures, as of  the end of the period covered by this report      based on such  evaluation; and                                                                                                          |
|   |   |                                                                                                                                                                                                                                                                                                                                                                                                                  |
|   | d.     | Disclosed in  this report any change in the registrant's      internal control  over financial reporting that occurred during the      registrant's most  recent fiscal quarter (the registrant's fourth      fiscal quarter in  the case of an annual report) that has      materially  affected, or is reasonably likely to materially affect,      the registrants  internal control over financial reporting; and |

| 5. | The  registrant's other certifying officer and I have disclosed,      based on our most  recent evaluation of internal control over      financial  reporting, to the registrant's auditors and the audit      committee of the  registrant's board of directors (or persons      performing the  equivalent functions): |
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|   | a.     | All significant  deficiencies and material weaknesses in the      design or operation  of internal control over financial reporting      which are  reasonably likely to adversely affect the registrant's      ability to record,  process, summarize and report financial      information; and |
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|   |   |                                                                                                                                                                                                                                                                                              |
|   | b.     | Any fraud,  whether or not material, that involves management or      other employees  who have a significant role in the registrant's      internal control  over financial reporting.                                                                                                           |

Date: 3-20-11

/s/ *James Steffey*                            Co-General Partner

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